There was an interesting Fraser Cain YT vid a couple of weeks back:

https://www.youtube.com/watch?v=wcR6gs0Up6k

Interview with Gerard van Belle, director or the Lowell Observatory.

The topic was space/lunar optical interferometers. It's easier to do this on the Moon than in space, as there's no formation flying. He's got a "menu" of projects from a few/small unit telescopes right up to lunar manufacturing like this.