Selfhostes Bitwarden - Nginx Reverse Proxy Access List does not work with any IP

I have problems with the access list and the reverse proxy.
I can’t get access to the browser extension or the mobile app. No matter what IP I enter under Allow. The only thing that works is the IP of the reverse proxy - but here I only get access via the browser - but not via the mobile app.
But the IP of the proxy is useless, because everyone runs over the IP.

What am I doing wrong ?