One vendor that I have seen more couples looking for during the Covid wedding season: an officiant. A suggestion I have for couples, based on weddings I've photographed, ask a friend or family member to marry you!
1. They are already planning to be there.
2. It makes it that much more meaningful when someone you know marries you.
3. All they need to do is register online (which can be free or small fee).
4. And you don't have to pay them!
LAST TIP: Just make sure they understand ahead of time where necessary signatures need to be on the required paperwork. Can't tell ya how many times I see people trying to figure this one out post ceremony.
Hope this idea helps with your 2021 wedding planning!