Limit Access to Learning Classrooms for Administrators at different legal Entities

One of my clients has a unique requirement where they have ~150 different legal entities, all with their own Learning Administrator roles specific to their legal entity. As part of the requirement we need to limit their ability to only see Courses/Offerings/Specializations tied to their legal entity, which we were able to do by creating a DFF for each Course/Offering/Specialization and creating access to that DFF value in their security role.

However we're not able to do the same for Classrooms.

Has any other customer had a similar requirement, and have you found a way to limit access to Classrooms for Administrators at different legal entities?