@noiob https://www.digikey.com/en/products/detail/w%C3%BCrth-elektronik/742792651/1638997 they exist! and are really common actually
the kind you thread a wire through don't really work for high-density surface-mount boards
-F
@noiob I mean it's the same exact thing, a wire passing through a deliberately lossy ferrite
-F
@noiob just packaged up to be easily positioned with a pick-and-place machine, and to take as little board space as possible
-F
@Felthry I guess, if you can call that a ferrite bead