We do require sattalites to have an end of life plan, that either safely deorbits, or moves to a graveyard orbit. The Outer Space Treaty is a bit vague on this

We do require sattalites to have an end of life plan, that either safely deorbits, or moves to a graveyard orbit. The Outer Space Treaty is a bit vague on this point, but in practice space fairing nations do require that their own launches gave an EOL plan. Most space junk is not a full device, but debris from one, which is much harder to clean up and impossible to completely prevent. This is also why there is an occasional international incident when a country decides to test out its ability to destroy sattalite.