Activate HTTP Port on FritzBox during renewal of Let's Encrypt Certs

[Frogy76]

Hallo
I use a FritzBox as a route and the NPN is runing on a synology in a docker container.
I only want to open port 443 to the npm. The problem is that the renewal fail becaus port 80 is not open,
I have a bash script on my synology that can open and close the port 80 on the FritzBox. Is it possible to integrate this script in the renewal process?
Or can I start the renewal from the synology via a script?
BR
Bastian