It’s already inferable that only dyads can use Force healing. Think about it, the dyad is treated as super special, we’ve only seen Rey and Ben, both part of the dyad, use Force healing, and there was no indication that any other Jedi or Sith was part of a dyad.
Baby Yoda uses it in The Mandalorian. He’s not a Dyad and it takes place years before TROS.
😉