Tenrai Event - Recouping missing challenges for progress tiers

Does anyone know if you can earn event challenges that get missed? Like, I’m out of time to play, but I still have one last event progression piece to go, I’m not going to be able to earn it in time. My schedule isn’t going to allow me to play again, and I still have to play till I get a stronghold match to drop, one didn’t in 4 hours of play, and then I still have to do 6 rounds of Fiesta. I hope you can earn it back throughout the season, but I don’t know if you can. 1 time will be ok, but any more missed and I’ll miss out on the mask at the second to last level