What you can do: https://www.patrick-breyer.de/en/posts/messaging-and-chat-control/#WhatYouCanDo
Contact your MEP: https://www.europarl.europa.eu/meps/en/home
Edit: Article linked is from 2002 (overview of why this legislation is bad), but it is coming up for a vote on the 19th see https://www.patrick-breyer.de/en/council-to-greenlight-chat-control-take-action-now/
Proton pretty much always complies with government access requests, and they never claimed otherwise. They, however, don’t have access to the content of your emails due to their encryption, meaning the data they give to governments is restricted to what you give them. They can at most give out your name, payment information, and backup mail if you voluntarily gave that info to them.