I believe both all of the video conferencing services (Zoom, Teams, Google, …) are currently incompatible with German law, as far as allowing kids to use them. I don’t remember the exact details, but I recall that it was actual some EU wide regulation that triggered this issue, but national laws don’t always fully implement all EU laws. So, some countries might have been more relaxed. Also, some schools in Germany were initially more pragmatic and allowed the use of video conferencing.
But most of these programs got shut down by the authorities after making national news.
I didn’t even expect that much. Video conferencing would have been awesome. But I was perfectly prepared to settle for email. Turns out, even that wasn’t allowed in our school district
I like Chrome Remote Desktop for ease of use and for the ability to get to all of my machines no matter where I am. Great when using Chromebooks, too.