Using my router's DDNS to point to my address

Not entirely sure if we can post these question here, but I have a DDNS through my router TP-Link with the address being for example I have a address pointing to a reverse proxy service on my Synology NAS. Do I simply create a CNAME record to point to my TP-Link DDNS address?

You cannot create a CNAME for the root of the domain (it would break as it would try to also read the DNSSEC related keys from the destination domain). So when you have a name, you cannot use CNAME to redirect Buf you can do

CNAME bar 3600

To have point to the same address as