No, yaySIM does not provide an unlimited data eSIM for Slovenia. All of the plans listed for Slovenia have a hard data cap, with the largest offering 100GB for 180 days.
Travelers who need a large amount of data can choose from fixed data plans such as the EU‑35_100_180 plan, which gives 100GB for 180 days, or the SI_50_180 plan, which offers 50GB for 180 days. These fixed plans can be more cost‑effective for most users unless a traveler requires truly unlimited data.