From January 1, 2025, the MiCA regulation comes into force in all European Union countries. Some countries may not have made all the adjustments yet, but generally speaking, companies in the crypto sector are obliged to follow these regulations.
You can see some more details here: https://www.globalgovernmentfintech.com/eu-crypto-regulation-mica-fully-into-force/
Yeah, a part of the MiCA regulation is more and more applied by some big CEXs the "EU travel rule" (aka you need to sign/declare ownership of non-custodial addresses you're using), for example Kraken:
~
Self-Certification: Verify ownership with a simple one-click process and a quick 2FA security check.
Satoshi Test: Send a small transaction from your wallet to confirm ownership. We’ll guide you every step of the way.
The MiCA regulations are being applied in various stages. Its' more "seriously" applied since a few months (if we talk of stablecoins since last June if I am correct, even if it's becoming worst now), but will accelerate in 2025.
If you're motivated, you can read more here: https://eur-lex.europa.eu/legal-content/EN/TXT/PDF/?uri=CELEX:32023R1114