Free speech protects journalists from being imprisoned for reporting on events in the world, with the angle to the story they see fit.
Free speech is not about preventing any old fart spewing actual falsifiable lies/misinformation from being silenced on a privately owned platform.
Free speech also isn’t about choosing to disregard anti-misinformation laws in other parts of the world, in the name of said old farts’ rights to say anything, but still insisting on serving customers in those same parts of the world.
That’s what EU is fighting against. Misinformation spread on a platform serving EU customers is finable. If Twitter/X wants to stick to free speech principles without being fined, they have two options.
combat misinformation/lies (this isn’t anti free speech)