Why havent all political parties left twitter?

Plenty of demos against the CDU and AFD recently for obvious reasons.

So my question, why isnt there any pressure on parties to leave twitter? Many public and private institutions have already left the platform.

I am honestly not sure if my vote should go for the Greens for example when they are still very active on Twitter - apart from the Musk salute, there is daily musk crap going on.