Hi @Daya
As I mentioned in my answer to your other question, permissions that are assigned at the parent OU\Container level will be inherited, directly assigned permissions are not inherited by other objects in the same OU\container.
It's probably worth having a read of these pages to get an understanding how AD permissions work.
https://www.windows-active-directory.com/object-permissions-active-directory.html
https://www.tenfold-security.com/en/active-directory-permissions-management/
Gary.