[trog]

I sync my photos via Dropbox and Google Photos, and I have a second phone which has a backup of my Google Authenticator (as well keeping separate backups of every QR code I add so I can re-add later).

Manually backup Signal messages.

I assume everything else is temporary. I've had too many Android phone fails where I assumed Google had some backup, but their 'backup' is basically just app installs and very little data seems to come through.