20 years worth of baptisms invalidated

Yes, Priest or Bishop. This hints at it, but their hands have been blessed in order to bless and consecrate things. (My rudimentary understanding).

https://thecatholicspirit.com/faith...substantiation-not-as-difficult-as-it-sounds/
It's the ordination into the priesthood of Christ via apostolic authority that enables them to act in persona christi when offering the sacrifice of the mass. Can't post much now but will follow up later.