I took a look at this curated list of bank apps[1] supported on Graphene OS and I'm glad that a large majority of them work on Graphene. However, just my luck that one of the banks I use on this list isn't supported.
In my country, the state is enforcing a lot of essential workflows to be digital-first (and in extreme cases digital-exclusive) and I dread to think needing these services at a critical moment and the choice of my OS making it impossible for me. This is more of a commentary on my government's choices but it's a reality for me.
In any case, I don't think it's practical to go cold turkey and switch to a privacy focused phone without testing waters first to see which of your of workflows break and then reason about the tradeoffs/workarounds.
I do admire folks who use GrapheneOS as a daily driver, I'd like to chat them up if I find them in the wild.
https://privsec.dev/posts/android/banking-applications-compa...