Hi @jeffep,
dig 7905lane.ddns.net NS +trace
$ dig 7905lane.ddns.net NS +trace
; <<>> DiG 9.18.28-0ubuntu0.22.04.1-Ubuntu <<>> 7905lane.ddns.net NS +trace
;; global options: +cmd
. 7188 IN NS e.root-servers.net.
. 7188 IN NS j.root-servers.net.
. 7188 IN NS k.root-servers.net.
. 7188 IN NS b.root-servers.net.
. 7188 IN NS f.root-servers.net.
. 7188 IN NS m.root-servers.net.
. 7188 IN NS l.root-servers.net.
. 7188 IN NS c.root-servers.net.
. 7188 IN NS i.root-servers.net.
. 7188 IN NS a.root-servers.net.
. 7188 IN NS d.root-servers.net.
. 7188 IN NS g.root-servers.net.
. 7188 IN NS h.root-servers.net.
;; Received 239 bytes from 127.0.0.53#53(127.0.0.53) in 0 ms
net. 172800 IN NS a.gtld-servers.net.
net. 172800 IN NS b.gtld-servers.net.
net. 172800 IN NS c.gtld-servers.net.
net. 172800 IN NS d.gtld-servers.net.
net. 172800 IN NS e.gtld-servers.net.
net. 172800 IN NS f.gtld-servers.net.
net. 172800 IN NS g.gtld-servers.net.
net. 172800 IN NS h.gtld-servers.net.
net. 172800 IN NS i.gtld-servers.net.
net. 172800 IN NS j.gtld-servers.net.
net. 172800 IN NS k.gtld-servers.net.
net. 172800 IN NS l.gtld-servers.net.
net. 172800 IN NS m.gtld-servers.net.
net. 86400 IN DS 37331 13 2 2F0BEC2D6F79DFBD1D08FD21A3AF92D0E39A4B9EF1E3F4111FFF2824 90DA453B
net. 86400 IN RRSIG DS 8 1 86400 20241225170000 20241212160000 61050 . VsUpZM/EUT78+QKJBycNB8NqnPjTs8kjn/tY9kO2N1tUn1T8fjMFM/9y Y4YnI48KWiFgQwOaAk83Dxvx3sAaMOu+gzbjE9CarBwbWzx/BuiKVaGC IzHUkstbPzCHrj5WAyhhIuasVPw4jeKOOCnzjLp/rgxFanUvvhs+ELhH pTq+IJC4LzvNl1WmbhsqymYYTolDH4+Dkjo+MO9J3lvH3oMWS+H7HIoZ kNzz4gPV3AgGjae+w7BZsAF4f6SLKBdEd6l+LlBrnAv7pVvC2iCbFIOK XPhZysD19MI5QCrCpQZxKlafTSbgLZtuwLnxkSJ1zGvaO1TpeOVClPvh 8XoknQ==
;; Received 1174 bytes from 199.7.91.13#53(d.root-servers.net) in 16 ms
ddns.net. 172800 IN NS nf1.no-ip.com.
ddns.net. 172800 IN NS nf2.no-ip.com.
ddns.net. 172800 IN NS nf3.no-ip.com.
ddns.net. 172800 IN NS nf4.no-ip.com.
A1RT98BS5QGC9NFI51S9HCI47ULJG6JH.net. 900 IN NSEC3 1 1 0 - A1RTLNPGULOGN7B9A62SHJE1U3TTP8DR NS SOA RRSIG DNSKEY NSEC3PARAM
A1RT98BS5QGC9NFI51S9HCI47ULJG6JH.net. 900 IN RRSIG NSEC3 13 2 900 20241218030541 20241211015541 31059 net. 95/AXILje3/q9qpnUOa4ciwD2W6gxUzXESLUCOqctprgh/tPQECVlzzR dA82A9I5PamG6Eul2YoNVXtHF5WEfw==
E51JQBMJA3CP91SA39O2RSF4M91A6OCU.net. 900 IN NSEC3 1 1 0 - E51PEEEEAJ4K8HQIM65HA9L4SEI317P8 NS DS RRSIG
E51JQBMJA3CP91SA39O2RSF4M91A6OCU.net. 900 IN RRSIG NSEC3 13 2 900 20241217025923 20241210014923 31059 net. DoJDPo/xp9+aHKLxRKDMYxlD68tjJb4yGlrtoni5hpeaIwVyzhIh8I29 lc9sSq5aIQnWC+xfYO76tWjfH+hWeA==
;; Received 484 bytes from 192.52.178.30#53(k.gtld-servers.net) in 33 ms
;; UDP setup with 2a07:dc00:1830::53#53(2a07:dc00:1830::53) for 7905lane.ddns.net failed: network unreachable.
;; no servers could be reached
;; UDP setup with 2a07:dc00:1830::53#53(2a07:dc00:1830::53) for 7905lane.ddns.net failed: network unreachable.
;; no servers could be reached
;; UDP setup with 2a07:dc00:1830::53#53(2a07:dc00:1830::53) for 7905lane.ddns.net failed: network unreachable.
;; UDP setup with 2607:f740:e626::53#53(2607:f740:e626::53) for 7905lane.ddns.net failed: network unreachable.
;; UDP setup with 2620:0:2e61::53#53(2620:0:2e61::53) for 7905lane.ddns.net failed: network unreachable.
ddns.net. 1800 IN SOA nf1.no-ip.com. hostmaster.no-ip.com. 2607758872 10800 1800 604800 1800
;; Received 106 bytes from 194.62.183.53#53(nf4.no-ip.com) in 11 ms
Show these are the authoritative Name Servers for 7905lane.ddns.net
$ dig 7905lane.ddns.net NS +trace | grep no-ip.com
ddns.net. 172800 IN NS nf1.no-ip.com.
ddns.net. 172800 IN NS nf2.no-ip.com.
ddns.net. 172800 IN NS nf3.no-ip.com.
ddns.net. 172800 IN NS nf4.no-ip.com.
ddns.net. 1800 IN SOA nf1.no-ip.com. hostmaster.no-ip.com. 2607759070 10800 1800 604800 1800
;; Received 106 bytes from 194.62.182.53#53(nf1.no-ip.com) in 18 ms
$ nslookup -q=any 7905lane.ddns.net nf1.no-ip.com.
Server: nf1.no-ip.com.
Address: 194.62.182.53#53
Name: 7905lane.ddns.net
Address: 72.183.233.22
Looking at the TXT _acme-challenge.7905lane.ddns.net
using nf1.no-ip.com. we find nothing.
$ nslookup -q=any _acme-challenge.7905lane.ddns.net nf1.no-ip.com.
Server: nf1.no-ip.com.
Address: 194.62.182.53#53
** server can't find _acme-challenge.7905lane.ddns.net: NXDOMAIN
ns1.desec.io. seems to believe that ns1.desec.io. and ns2.desec.org. are the name servers.
$ nslookup -q=any 7905lane.ddns.net ns1.desec.io.
Server: ns1.desec.io.
Address: 45.54.76.1#53
7905lane.ddns.net nameserver = ns1.desec.io.
7905lane.ddns.net nameserver = ns2.desec.org.
7905lane.ddns.net rdata_59 = 46898 13 2 EA9A0261D761B503C185C618ADE6C4A30C27AD343C7BD9710312A13B 9A079439
7905lane.ddns.net rdata_59 = 46898 13 4 0B0F0B836B19ABCA0BD93D55DB7B4C72BDE0E72376FB3D65A6976CE2 A52599B64700A8B35411DC131571DE47DF125A19
7905lane.ddns.net rdata_60 = 257 3 13 Q6W3lPRDhnbf4pdKDccKzeW/YDwD/E/pAfarp5mLgvkYAi9nAPV7CUt5 PkeHYMTzfX+u6IiC22EVNOPDgYylHA==
7905lane.ddns.net
origin = get.desec.io
mail addr = get.desec.io
serial = 2024123969
refresh = 86400
retry = 3600
expire = 2419200
minimum = 3600
And looking at the TXT _acme-challenge.7905lane.ddns.net
using ns1.desec.io.
$ nslookup -q=any _acme-challenge.7905lane.ddns.net ns1.desec.io.
Server: ns1.desec.io.
Address: 45.54.76.1#53
_acme-challenge.7905lane.ddns.net text = "oRkhltb3OtxNpmxvAp0glySGa33DrxI35alaMqvFm1M"
And results from ns2.desec.org.
$ nslookup -q=any 7905lane.ddns.net ns2.desec.org.
Server: ns2.desec.org.
Address: 157.53.224.1#53
7905lane.ddns.net nameserver = ns1.desec.io.
7905lane.ddns.net nameserver = ns2.desec.org.
And with ns2.desec.org
$ nslookup -q=any _acme-challenge.7905lane.ddns.net ns2.desec.org.
Server: ns2.desec.org.
Address: 157.53.224.1#53
_acme-challenge.7905lane.ddns.net text = "oRkhltb3OtxNpmxvAp0glySGa33DrxI35alaMqvFm1M"
Thus it looks like to me that deSEC is propagating well; it is just no one knows to look there as it is not the authoritative Name Servers.