It is actually possible to use Aegis for Steam, that’s what I do. It’s a pain to setup if you’re not rooted (I think you need to use an Android emulator on a computer and then export the Aegis DB to reimport it on your mobile IIRC) but it’s possible. Look at https://github.com/beemdevelopment/Aegis/wiki/Adding-Steam-to-Aegis-from-Steam-Desktop-AuthenticatorSteam is still very welcome to go fuck themselves with their shitty app, though.