If there are no username/password input form on the page, but if there are some input fields suitable with the custom fields registered to bitwarden, the iOS extension does not auto-fill and just show “Copy username” or “Copy password” menu.
This causes a problem in my usage because in some websites, we first have to input username/password and then move to a new page to input the other additional informations. The second part is the point where the iOS extension does not work.
(Chrome Extension on MacOS perfectly works about it.)
It would be very nice if iOS extension also auto-fills without username/password fields.