The way domestic services (both public and private) in Finland verify user's identity is via bank credentials (Finnish Trust Network), via Mobile ID (Mobiilivar

The way domestic services (both public and private) in Finland verify user's identity is via bank credentials (Finnish Trust Network), via Mobile ID (Mobiilivarmenne), or via government FINeID. All these involve multi-factor authentication. The service then gets the user's personal identity code as a return value. Looks like that kind of flow is not supported. Finnish users will be very hesitant of giving scans of their ID documents to foreign companies as no domestic online services require them. And of course Finnish companies cannot practically use this for now, at least for domestic users.