The stones were sentient. As such they were strong with the Force... In fact, the stones were *so* strong/unique in the Force that they were all but immune to Yoda's application of TK initially -- he had to learn from Garro(an inhabitant of the planet) *how* to manipulate them at all. However, it was never once implied in this arc that the planet amped Yoda's powers in any way/shape/form.
What *was* implied is that Yoda experienced a moment of 'oneness' with the Force -- and in that moment, anything was possible:
That said, Yoda still preformed the initial halting of the mountain(AND the others around him) before it was implied that he became one with the Force... So his raw TK is still very much showcased here. 👆