Yet 58% of MEPs are still on X.
https://leavex.eu/ is a useful resource for those who want to call them out on it - find the representatives from your country still on X, let them know what exactly they are supporting by staying there, and maybe nudge them towards something like https://eupolicy.social/ as a more reasonable alternative.
Remember to be polite - many of them/(the ones we care to convince) are good people who are just doing what they have been told they need to do in order to communicate with their base. They just need to realize the world has changed.