Supervised on debian 12, duckdns problems

Hello, i have recently moved my home assistant instance from an old orangepipc to rpi3, and finding that it’s still not stable/powerful enough tried to move to an old laptop with debian12 and supervised. In each instance, i had the firewall rules for duckdns and lets encrypt set in my router, and after installation, moved the rpi onto the previously configured ip address to take the place of the old device. Opi to Rpi worked just fine, but after setting up supervised locally at first, and then moving it to the " production ip address" for want of a better term, i have not been able to make the remote connection possible.

I checked all the suggestions here,

and tried some other suggestions found elsewhere. Is this just a known issue linked to the installation method?

Thanks for any thoughts or comments please.