Hi appexp4u,
Apple has a Photos User Guide online:
https://support.apple.com/en-au/guide/photos/phtad9d981ab/6.0/mac/11.0
This example seems to show how to move the circle:
- Click the Info button in the toolbar. Click the Add button , drag the circle to position it over the face if necessary, click the Name field, type a name, then press Return.
- You can click the Add button multiple times to identify multiple faces in a photo. To remove a name that you added to a face, click the Remove button on the person.
Hope this helps, else feel free to "Post" again :)