These laws are only applicable in two of Germany’s 16 states and only for state officials and authorities as well as schools. The other states mostly critize those states for infringing on equality rights. It just bans the use of gender related punctuations in written documents and school exams. It’s not well thought out.
You can still use gender neutral terms (Lehrende instead of Lehrer*innen). It’s a big deal as those states do it to cater to right-wing voters and fish them from the nazi-party AFD.
Btw Binnen-I is LehrerInnen. Other gender neutral notations are a “*”, “_” or “:”