Its been my experience at least that once a site gets too good it gets shutdown. I got tired of that dance so I just properly setup radarr and Sonarr with Usenet.

Looks like mine auto updated already and it seems fine

No. Signal encrypts every message on the device itself before sending to Signal servers. You can even confirm this yourself by looking at their github.

Whats app claims they do this but its impossible to confirm. Its extrenemly likely that either they dont encrypt at all or they have the decryption keys.