Stacking multiple images together would work as long as they’re of a minimum standard otherwise the poor quality ones will muddy the pool
As for long base line imaging, this is routinely done in radio astronomy but sadly it doesn’t work in optical. The large professional telescopes with hundreds of segments work because they’re all pointing towards the same secondary mirror and hitting the same CCD. So for optical astronomy it doesn’t matter if the telescopes are across the globe or across the street.