Once Marriott Bonvoy® Points are forfeited, the Marriott Bonvoy® Points cannot be reinstated, but a Marriott Bonvoy® Member can earn new Marriott Bonvoy® Points, unless that Marriott Bonvoy® Member’s Account has been deactivated.
Past threads in this forum appear to confirm there is no exception to this rule.
Even without travel they could have been extended by CC spend or just buying points from Marriott. I know that is not helpful now but hopefully helpful to avoid a repeat occurrence in the future.