I kind of thought this was already possible...but finding the usages of system.members of an entity like createddate would be really handy!
The created date etc. can be used in microflows, pages etc...would be nice to check where.
As a workaround, in the entity you can untick the system member checkbox momentarily. This will cause errors that will show you where the system member is currently being used in your project. You can then undo the change to the entity.