Autofill via the pop-up menu upon field focus doesn't work.
P.S. I don't and won't use Google Chrome, so I won't be testing using it.
No login details are autofilled
Login details are autofilled
You need to open the 1Password app to copy your login details and paste it manually to the login field.
1Password Version: 7.7.7
Extension Version: Not Provided
OS Version: Android 11