Looks like the issue is solved
But I just wanted to add my two cents. Our team is helping coordinate & fund 13 FLL teams from around Rochester this year, and I think only 3 of them actually have teachers involved. The rest are all run by parents or other interested parties.
Realistically, you just need an adult contact for the FLL registration, and it doesnt mean that that person has to remain the main mentor, so you can start with a parent as the contact, then switch to the teacher or have them as co-leaders if it works out.
Best of luck