No, yaySIM does not provide an unlimited data eSIM for Réunion. The available options for Réunion are fixed data plans: for example, a 20GB plan that is valid for 30 days or another 20GB bundle that is valid for 90 days, and 10GB bundles that are valid for either 1 day or 30 days. These plans offer substantial data allowances and use 5G where available, but they are not unlimited. Choosing a fixed data plan can be more cost‑effective for most travelers unless they are extremely heavy data users who might require a pay‑as‑you‑go option instead.