what brand is this? :O asking for a friend

No you don't

All apps I need for banking, 2 factor authenticator, etc work in my GrapheneOS phone, with the exception of one particular app used for ID authentication in the country I reside. The reason is bc this app uses Google's Play Integrity API to check the phone's OS, and since it does not match with Google's Android OS, it stops working since it does not pass integrity checks. As far as I know, there are few apps that do this, and as time passes more apps are moving towards hardware-attestation tests, as GrapheneOS facilitates, instead of relying Google's Play Integrity. For me this is not an issue, because the government provides other means for ID authentication, but some other countries only relies on apps, and that might be a show stopper.

GrapheneOS is a good alternative to iOS/Android, although still Android-based

Does anyone know if Tuta has an alias email feature?