Hello george apple,
These steps from Automatically fill in strong passwords on iPad - Apple Support are meant to help automatically fill in your passwords:
Automatically fill in a saved password
Depending on the website or app, signing in with your saved password usually consists of steps similar to these.
1. On the sign-in screen for the website or app, tap the account name field.
2. Do one of the following:
• Tap the account suggested at the bottom of the screen or near the top of the keyboard.
• Tap
, tap Other Passwords, then tap an account.
The password is filled in. To see the password, tap
.
To enter an account or password that isn’t saved, tap
on the sign-in screen.
If they are still not working, Tap on Settings > Passwords > Password Options, and confirm AutoFill Passwords is toggled on.
Cheers.