Being done means it is being worked on. Done means there is no more work to do. "The building changes are still being done." ( they aren't finished)

Has been done or has being done?

“Has been done” is a present perfect passive tense, which should be used for an action that happened at an unspecified time in the past. You should not use this tense when the time is specified. Use the simple past passive “was done” instead.

Has been done mean?

'Has been done' might refer to the fact that someone did something at some unspecified time in the past. Although a lot of research has been done, much more is still needed.