Thank you for your follow-up.

Explanation 1: I have a select field that is displayed in the users’ profile when they are logged in to WordPress. This field shows the level of the user, such as level 1, level 2 and level 3.
I want the value of this field to be locked and not allowed to be edited when the user enters the profile section.
Explanation 2: For the above part, now I want the site administrator to be able to edit a number of users for this field. It means to be able to select a number of users and then apply the value for example “level 2” to the field.
Currently, with afc, you can easily add this field to users’ profiles, but I don’t know how to restrict access to it.
And now I want the administrator to be able to easily edit this field for users. Currently, you have to edit each user separately and then edit the desired field, which is a time-consuming task.
It would be great if it was possible to create a relationship between the list of users and the values of the field like in the “acf relationship” mode.
No need to include a screenshot. My questions are simple.
1- How to make a field created for users without editing by the access level of the user.
2- How to group edit a selected field created for users.