Apps that don't work with Autofill

I'm in the final days of a 1Password family account trial. Our family environment is: 2 Windows 11 devices (Desktop&Laptop), 2 Android phones (Pixel 7 and Pixel 6). I've got the Windows environments working, although my wife has not used 1PW enough to say all is well, while I've checked out key sites and it seem to work fine for both of our Windows and 1Password accounts.

I've got the Pixel 7 working and my key test is opening RBC, CIBC and Simply Financial banking apps. I did have some problems getting it to auto fill and in the haze of getting it to function I honestly can't say what other than Auto Fill in 1PW and Android settings I did. I have had to go through the process of copying 1PW's passwords into the Android apps password field in some cases and received a 1PW message something like "fill and update", after which it more(?) automatically fills the password for that site.

My wife's Pixel 6 is another issue all together. I've got the CIBC app to auto fill the banking apps password, but am stuck with RBC's app. I've not got to Simply yet, but expect it will be similar to CIBC as SImply is related to CIBC.

I need to provide a stable Pixel 6 to my wife, and 1Password for android on her Pixel 6 just isn't there.

Are there other settings required?

BTW: I manage the shared vault that she uses for the banking apps and other accounts we both need access to.

Thanks.