Holy hell
I'm using a Poco F3, running MIUI 14 (Android 13) debloated but I might install crDroid on it someday.
I previously used a Honor 6X with LineageOS 14.1 for 4½ years, before that I used a Lumia 735.
I use openSUSE Tumbleweed with Plasma on both my desktop and laptop, I used Arch before.
I personally use KeePassXC, it's FOSS and even has an extension for browsers. For Android there is KeePassDX.