We need a proper set of vehicles for a scrap/junk yard RP. Like a Excavator with a grapple, Shear, a Vehicle crusher that crushes them then bales them. and a wheel loader with shovel, grapple and a forklift to load and unload vehicles.
I think there's already a crusher in the props section, never used it myself though. As for machinery like excavators, you might find something in the mods repository that suits, but I doubt it will be a first-party thing in the short term. Beam already has an undeserved reputation of being a car crash game for kids (thanks generic gaming YouTubers), rather than the vehicle physics simulation sandbox that it is. Maybe a config for one of the heavy trucks in the game?
Try these https://www.beam-monsters.com/files/file/10-fps-crush-pack/ the websites 100% fine but you haft to make an account there to download them and you can also get the monster truck from there also https://www.beamng.com/threads/cancelled-farming-pack-v6-0.29159/ has some crush tools you attach to the tractors and https://www.beamng.com/resources/codename-oldsfullsize.1417/ and the add on pack has scrapyard cars hope it helps
the gavril b-series has some meat on its bones, and can crush cars pretty well. the crusher prop is like a floaty cuboid thing that jams cars into cubes, more of a test than anything the large roller could give you more authentic results