You keep saying that it is meaningless. We are trying to edit the files on a regular basis only for the edit to be rejected because the file is READ ONLY.
At least in Win10 there was a workaround to this damn bug. The latest version of Win11 will not accept ANY workarounds.
There's a difference between "meaningless" and "useless". The item labelled "Read-only (Only applies to files in the folder)" does not indicate that the folder is read-only. It doesn't indicate anything. But it's not useless. That item can be used to set all files in the folder read-only and it can be used to set all files in the folder not read-only. That behavior is unchanged from Windows 10 to Windows 11.
Let's try to find out what is different and what is the root cause of the problem.
What type of files are you trying to edit that are ending up read-only? What applications are involved? Where do the files reside (i.e. what is the drive and path)? Does setting all of the files to not read-only fix the issue temporarily or not at all? What are the exact error messages (screenshots are always helpful)?