I have an old $70 test device with stock Android/Google that hasn't seen security updates in half a decade yet all banking apps, electric car charging, Google services, you name it, work absolutely fine.

Meanwhile the daily driver phones of my privacy-aware family members running up-to-date Lineage or Graphene OS with recent kernels and frequent updates constantly run into apps refusing to work for "security" reasons. It's a complete joke.

To pass MEETS_STRONG_INTEGRITY a device needs to have a security patch within the last year. Most apps don't check for storng integrity, though.