Wipr works good for me

What iOS Pixelfed client do you use?

Have you tried Session?

Don’t understand your negative reaction. The app encrypt mail with e2e.

You can use Delta Chat app with any email services.

I use Authy. It has Apple Watch app for quick access.

There is an standard client-server encryption in Telegram. If you want e2e encrypted chat, then use Secret chats. Almost all messengers nowadays use client server encryption. So the biggest problem is not man-in-the-middle attack, but physical access to device by someone and malware installed via breaches.

I use Authy. It has an Apple Watch app