Works for existing customers, US$1.75 should get you about 700MB of data depending on the country.
New customers can also get Free US$1.25 Credit for Travel eSIM with No Expiry of Data (Worth up to 500MB in Europe) @ Roamless and Free US$3.75 Credit Travel eSIM (No Expiry on Credit, Redeem for ~1.5GB Data, New Signups Only) @ Roamless
Could this be a way to setup a phone number in another country?