Kind of hilarious that you put so much stock in "full frame," i.e., miniature format sensors, when the moonwalkers in the 60s and 70s were shooting with 6x6 Hasselblad 500s with an image "sensor" 3.6x larger than "full frame."
Go pick up a copy of the coffee table book "Full Moon," which consists of rescans of the original Apollo positives, and you'll see images just as good or better in resolution and dynamic range than what today's "full frame" mirrorless cameras can produce.
Sure, the modern digital cameras can take a lot more photos a lot more quickly and can also do things like video, but if NASA really wanted high end imaging by today's standards, they'd be contracting with someone like Phase One to do a true medium format space camera, or even deploy large format scanning cameras, rather than dicking around with something so piddly as "full frame."