Check out nostr:npub198krwyj8uc63n9auvx56gtc7gk60lmm63cgxd7j62nev3yquqk3shkew2s and her podcast. She is from Germany and moved in order to unschool. Maybe her perspective can help you talk to these folks.
Discussion
thanks I appreciate it
Also depends where you live, but for example in Czechia it is legal. Not welcomed by state and you need to comply with bureaucracy (which should not be surprise for German π ) but it may be a way in the future to formally study in Czech school to have paper for German state and in reality homeschool. Just an idea :)