[hexfish]

Re: the bank apps: that really depends on the bank and the country. I live in a eu-west country and there are afaik no apps that do not run on Graphene (which did suprise me I must admit).

Whatsapp can work if you use sandboxed Google Play (I still use a Google account, I just don't want gplay to have effectively root on my device).

Depending on the level of integrity check your app might just work. Gory details: https://grapheneos.org/articles/attestation-compatibility-gu...

And like others said: no contactless payment, but I dont use that personally anyway.