Hi,
I think a lot of people searching for solution for autofill custom fields on Android devices since the Bitwarden app doesn’t support custom fields.
I haven’t found this tip anywhere so i have decided to post this here.
Right now custom fields are being support only with its browser extension
Luckily Firefox browser on Android has addons and one of the available addons is Bitwarden! So just install it using Firefox menu and when you need to fill custom fields use Firefox browser and its Bitwarden addon.
Enjoy.