Meta does not have the support of legislators. The EU would regulate any service that would even aspire to become a Western WeChat way before they have any chance to succeed.
WeChat is so much more than just a messaging app. This is a common misconception when comparing WeChat and Whatsapp. The functionality of those two is not even remotely comparable.
That claim does not ring true to me. Maybe a few years ago, but now? I don't use whatsapp and I don't know anyone who uses it, except for a group of expats from South America who probably use it because it's still widespread in South America and their friends use it, maybe?