I am german, so yes i guess you could say i am fluent. However, since the studies are mostly remote and a lot of communication is in written form, you should get by with okayish german during the semester and exams. There are quite some essays to write and presentations to hold though (more in the Master than in the BSc), so i am not sure how that would work out but could also see them being flexible and let you do it in english, since it's smaller groups and thus more personal mentoring. This is just a guess though.

Otherwise you'd need to try something like Internationale Medieninformatik at TU Berlin which is in english, but not remote unfortunately. Otherwise maybe the Open University Masters is something for you, or of course the GTech MSc which is quite a bit more expensive though.