Where is the data volume charged to the WLAN hotspot via mobile phone?

If I go to the Internet with the laptop via the mobile hotspot of my mobile phone, is the amount of data requested on the laptop also billed via the mobile phone tariff?

Probably already, right?

Yes sure.

Yes it will.

Jup, recognized correctly.

The smartphone does nothing else, as a bridge between mobile and your laptop via hotspot set up.