No, Stellar eSim does not provide a true unlimited data eSIM for Uruguay.
All of the plans that include “Unlimited” in their name actually have a hard data cap—most are 3GB for a set validity, while the largest fixed‑data options are 50GB for up to 180 days or 365 days, plus a free Stellar VPN for the same period. These are fixed data plans, and for travelers who need more than the largest cap, a Pay‑as‑you‑go plan could be considered instead.