

I had a similar history to you.
I finally decided a couple months back to start de-googling and did the following so far:
- switched Google Password Manager to VaultWarden
- switched Google Search Engine to searxng
- switched Google Keep to Obsidian/memos
- switched Google Drive/Office to Cryptpad
- switched Google Chrome desktop to LibreWolf
- switched Google Chrome Mobile to Fennec F-droid
Only progress I made is switching to iOS from Android. Installed Ff on mobile, but didn’t really like the experience, so not really using it.
Well if you switched to iOS then there’s not really much point as the browser backend is still the same as Safari there. Apple doesn’t allow other browser engines so on iOS Firefox/Chrome/etc are all just wrappers on Apple’s browser engine.
Apple is worse than Google in many ways and if you wanted to maintain control over your privacy (and even just de-google) you ironically would be better off staying on Android.
There are many great custom firmwares available for Android devices such as GrapheneOS which can truly de-google your device.
I came across this issue on my own discord server, the system kinda encourages you towards those higher security levels without really being especially clear about what it will do to the user experience.
One thing I would clear up though:
I think both sides in the OP are correct here.
Yes, the server admin sets the security level that triggers those requirements.
But it’s also true that the server/admins do not get your phone number, that private information is only kept within discord’s verification system. It is not sent to the server admins.