When trying to login to the Amazon (DE) app for the first login field „email or mobile“ there is no possibility to use 1Password. You have to manually open 1Password and copy the email into the Amazon app. When you go further to the next site for the password field there is the possibility to use autofill with 1Password.
Is this a known problem? Can you fix this behavior? I‘m using version 7.4.6 of 1Password app.