Have those other laws been enforced against Discord? Also, pulling out of one zone because they enforced (what you believe to be an onerous) a law against you is always valid, it'll make the others think hard about enforcing the law against you.
We are not talking about some high-security military stuff here, it's only a chat app.
It might be a big part of your world, but I can guarantee you that if they try to pull that off nobody in any government would care.
I am pretty sure of the contrary actually: that several governments in EU have dreams of getting rid of these platform, and that they can't do it because that would be illegal.