I’ve worked out that the Hubble Space Telescope–despite orbiting above the Earth’s atmosphere–can resolve objects on the surface of the Moon that are at least 40 feet across, which means that at best a base of one of the Lunar Module _might_ show up as a discolored pixel in a picture–certainly without enough detail to remove doubt. Since the largest ground-based telescopes using adaptive optics can now match Hubble, it would have to be a really huge scope to pull in enough detail to remove all doubt.

I think at least some hoaxer cite as part of their “proof” that NASA does not allow Hubble to point at the Moon because it might show that the Moon landings never happened.

I picked up a steady reflection just west of Maskelyne G crater (Apollo 11) with my 60mm refractor. I forget the eyepiece I used, but it was around 60x magnification. The text in “First on the Moon” named the landing site as beside Maskelyne W.
You can’t use a very big telescope, to view the moon. I tried with my 8″ reflector, and durn near blinded my right eye. Moon’s just too bright.