Color Dailies exist. Many of which are the same scenes as in the lost cut. Not sure which footage is technically lost and they would have to use the black and white for those scenes.

Some of the color dailies have been seen but not all in the 2004 documentary, and some on the blu ray in the deleted scenes.

The 77, 1997 are lost cuts since no new transfer was made for DVD or blu ray.

Would kind of be weird for the John Jympson cut on Blu Ray when the actual real trilogy from 1977-1983 is only available from a 1993 laserdisc print.

And Disney has no plans to change Lucas revisionism/destruction of a cultural icon.