I can’t personally speak on the banking side. e/os has micro g implemented now, and on my device it passes the safety checks associated with it. To be fair though I can’t give a full endorsement for how well micro g works as a whole (I’m not logged in) In general I’ve shifted to FOSS apps so my sample size for google play services reliant apps is limited but the one’s I have used, open fine without annoying pop up errors.