Check now if an eSIM profile is installed/pre-installed on your device. Click on:
Start > Settings > Networks & Internet > Cellular > eSIM Profiles.
At the top of the page, you can see which SIM card/eSIM are installed on your device. Ubigi eSIM profiles will be displayed as TSL-1234 (ex: TSL-0131, TSL-0199, etc.).
If you have a Ubigi eSIM profile, click on the little arrow to display more options and click on use to select it (click yes on the displayed message).