It could be that it was shot and just never found.
There was like 1.5 million feet of film shot for both STM and SII.
An incredible amount of it was never even printed off the Negatives(bad takes)......so there is still a lot that no one(including the likes of Donner) have never seen(apart from the day they shot it).
Prior to the editdroid(introduced by Lucas in the mid 1980s) the way of cataloging film negatives was very antiquated(ledgers and paperwork).
Those particular inserts of Kidder's close ups could have been lost back in the day if Baird's editing team never got a chance to assemble that sequence at the time.
That makes sense because it would have involved lots of different departments being involved(Roy Field's Optical crew in particular) and they did not have time given that they were focusing explicitly on STM with regards to optical work.
It's interesting that the SII footage that Baird did edit and complete during the original shoot are those sequences that DID NOT involve special effects and heavy optical work.
Don's Diner and the White House come to mind.
Any painting out of the wire work on the Moon was completed by Lester's team in 1979(this probably also includes the fire underneath the NASA shuttle as it tries to take off ).
As you can see Thau had to completely re-assemble Lois's jump out of the Daily Planet and all the FOS stuff (Hackman's interactions with Brando ect ect) precisely because Baird did not have all the material at his disposition in late 1977 to assemble it there and then.
On edit
A good technical commentary track on the RDC would have helped......not Donner's and Mank's superficial bantering.