Ciao Marco! Dr. Miro is indeed well-known and is a good choice for Metoidioplasty. He's splitting his time between Belgrade and New York now. Another option is Dr. Vicini in Rome:
https://www.patriziovicini.it/roma-gender-team/
Choosing a surgeon is complex. It's really about who you are a good match with, and that can come down to funding, complication rates, location, aftercare, communication, etc. It's recommended to have consultations with multiple surgeons.
I wish you the best in this part of your journey!