You may need to add/subscribe to the relevant group. Go to the server buffer (^ from the Group view) and look for an nnml server. Enter the server (RET) and subscribe (u) to whichever group makes sense.
It's been so long since I did this that I cannot remember what is needed. -- Eric S Fraga via gnus (Emacs 30.0.50 2024-02-26) on Debian bullseye/sid
