If you see the message "Access Point Name settings are not available for this user," it means you have to add an APN manually.
On the Access Point Names screen, tap the + icon at the top.
Enter data.esim in the Name field.
Enter data.esim in the APN field.
Save the new APN.
Go back to the list of Access Point Names.
Select the data.esim APN you added.
Restart your phone.
After restarting, your phone should be able to connect to a supported local network.
If you need detailed instructions with screenshots, go to the article: How to Set APN on Samsung and Other Android Devices
