Any clever solution / ideas how to autofill those?

Hey @Zinzun, @unknowndomain is correct. The best approach to filling such fields is save your pin and password to your login item. You can then refer to those when you're asked to enter specific characters from them.

Sadly not, people have been asking for this in 1Password since forever but they've always said it was too complicated to make it work for every bank - I feel like they must be able to do something clever with it though.