Meanwhile, Polish gov't uses Microsoft Teams [1] as one of ways of verifying citizens who are applying for trusted profile service. [1] - https://moj.gov.pl/uslugi/engine/ng/index?xFormsAppName=Wnio... (in Polish)
It's really astonishing how governments, especially the European ones, don't cluster on open-source and self-hosted resources for all of these things. To be honest, I know the "easy answer" to this: "IT consulting firms, incompetence, bureaucracy and corruption", but even with that, it should be possible to do it with open system and not just rely on some other countries even for the software.