Yiu are from Europe, you are lucky. You can use bisq.network which is decentralized. On other decentralized and no KYC exchanges where you can exchange to fiat, there are many euro ads there.
If you want centralized exchanges, OKX and many other exchanges that have MiCA license have P2P. So P2P supposed not to be an issue for people that are living in Europe.
Aside from Bisq, he can also try Robosats and Hodl Hodl, since I think this platform is fine and this is another best option to use. This gives advantage to those people don't want to deal with KYC when doing their trades.
Also Mica does not actually remove p2p on those platforms. So they can still use their services if they like to transact with this platforms.
This new regulation made, makes adoption became more harder. Because many people will provably get discourage on those rules they implement.
p2p as a type of trading, does not fall under the MiCA regulation. This means only a direct exchange between two users, face to face, wallet to wallet... If there is an intermediary platform that will help two users to find or agree on a price, or even a platform that serves only as an escrow, it must be MiCA compliant/licensed.
What might be confusing is that the most well-known platforms, such as those mentioned above, are "no-KYC," meaning they do not even know whether a user is from the EU.