Droste
EASA does convert ICAO licences but the process is very tedious and expensive. It involves going through an ATO, passing the ATPL exams in most cases, skills tests etc. There are also minimum experience requirements.
You can find the process laid out in Commission Delegated Regulation 2020/723:
https://eur-lex.europa.eu/legal-cont...0R0723&from=EN