Steps to reproduce the issue

Set a User->Field (Phone as an example) to 'Required'="yes", AND 'Editable In'="Site"

Create a user with REST API:
POST: {{base_url}}/{{base_path}}/users

BODY:
{"block":"0","email":"bob.smith@test.com","groups":["2"],"lastResetTime":"","lastvisitDate":"","name":"Bob Smith","params":{"admin_language":"","admin_style":"","editor":"","helpsite":"","language":"","timezone":""},"password":"qwerty1235%%##","password2":"qwerty1235%%##","registerDate":"","requireReset":"0","resetCount":"0","sendEmail":"0","username":"bobsmith"}

Expected result

API should process User Create
Since the Admin can create a user in the Admin interface without being required to enter a value in a required field WHEN 'Editable In'="Site" - I would expect that the Super User can create the user via REST API with the same conditions.

Actual result

Create User via REST API Fails:

JSON Response:
{
"errors": [
{
"title": "Invalid field: phone"
}
]
}

System information (as much as possible)

Joomla 4.0.6

Additional comments