Return of the Ewok 4k Enhanced Clips

Footage from Return of the Ewok film/documentary and Disney has restored the old footage and placed it into one of their star wars behind-the-scenes videos. It’s clear they still have parts or even the entire movie and yet I don’t understand why they don’t go into the SW Archives and restore or EVEN RELEASE these old videos. Let me know if any new footage is found that’s been released.