Currently the password autofill function only works with Chrome. I don't use Chrome - I use either Firefox Focus or Duckduckgo, so autofill on the phone doesn't work for me. I'd like to suggest that you support other browsers. The main reason I started to use the Norton Password Vault was to have the functionality on the phone. As it stands, I need a different password manager.
It does not work with Microsoft Edge on a Pixel 3a phone.
I will second that. I also use Firefox. It is very frustrating not to have an auto fill option. Between this issue, and the VPN having to be turned on manually, I will be switching services if they are not fixed when my subscription is over.