Maya Mobile does not provide a true unlimited data eSIM for Hungary. The plans that carry “Unlimited” in their name give a fixed allowance of 5GB per day of high‑speed data, after which the speed drops to 3 Mbps. These are fixed‑data plans rather than unlimited.
A couple of examples are the 3‑Day plan, which offers 5GB/day for 3 days, and the 30‑Day plan, which offers 5GB/day for 30 days. If you require truly unlimited high‑speed data while traveling in Hungary, you would need to consider other providers.