These are Skywalker Sound sound effects. Some of the footstepping sounds resemble SKYWALKER, FOOTSTEP - DINOSAUR FOOTSTEPS, but sped up. Some of the takes are processed variants of either the 4th or 11th impacts that are heard in Train: Trains - Freight Cars Coupling Impact - MCU - Bg Engine Noise, Also Rattles, Clunks, Squeaks, & Creaks, All Coupling Related, Several Ambiance Changes from the Soundstorm Sound Effects Library, that was made by SoundDogs. Links: https://soundeffects.fandom.com/wiki/SKYWALKER,_FOOTSTEP_-_OMNIDROID_FOOTSTEPS#Audio_Samples