France can’t ban VPNs. That would require punishing people for using a VPN, yet France has no way of knowing who does, so such a law would be next to impossible to enforce. If such a law would get made, it would be a mere scare tactic for intimidation purposes. Only the gullible would fall for that.
So, pure speculation then and french users were reading into it and thought these are official plans out of fear. There wasn’t a reason to believe it anyway. If Macron were to do this, you can bet he would already boast about it everywhere.
When it comes 5o content laws on the internet usually the website has to comply most with where the site is actually hosted. The most other countries can do is block access to the webpage. Unless Derpii is Stationed in the Eu, nothing the EU does will affect Derpii on its own. The ones affected will just be the users in the EU.