They didn't, though?

The H2D's printer/laser combo was done by Snapmaker before that, and the "2 heads" thing was done numerous times in many different ways before the H2D.

The AMS may not have looked exactly like that, but the same idea was already in place by Prusa at least.

Tool changers are not new, and the way that the extra hotends are held and dispensed was already in use in industrial machines. The "6 extra hotends" thing ... I'm willing to admit that might have been an innovation not yet seen in the 3d printing space, but BondTech announced their INDX before Bambu announced their solution. Both were in R&D for years before that, of course.

But Bambu was big and popular long before their current generation of printers. Only the AMS could be seen to contribute to their popularity, and again, it was because it works so well, not because it was a new idea.