It could also be a pre-prepared disk image.

Next time during setup do this: 1.don’t connect to a network

2. Either shift+f10 or Ctrl+shift+f10 to bring up a command prompt.

3.Type: start ms-cxh:localonly

4. Hit enter and the create user box will pop up.

5. You can now create a local user account.

Or dont connect to a network during setup and do this.

OOBE mode.

1. Ctrl+shift+f10 or shift+f10
2. Type: start ms-cxh:localonly
3. Create local account

Finish initial windows boot, then follow up with O & O shut up 10 at minimum before connecting to a network.

Then there is the fun of going through the task scheduler to remove telemetry.