It’s better on android than Apple. The biggest problem on Android seems to be sites not following standards in identifying their fields which breaks autofill.
On iPhone this same problem exists, but you also have to deal with iCloud sporadically taking over and messing up the workflow, adding fun new ways for it to fail.
You have to be doing something wrong I’ve used Bitwarden and keepass on iOS for a long time with no issues just disable the apple one definitely works better then on my pixel