Short answer
When your included data runs out, the eSIM may stop providing internet until you buy more data or start a new plan.
What to do
Open the app and check the main screen.
If there is no data left, buy more data or choose another available plan.
Important
The included data is for the full plan period. It does not reset every day unless you have a daily subscription.
Buying extra data does not automatically cancel your current subscription or change auto-renew settings.