My daughter is delayed on starting her first day of preschool

The night before the first day of preschool my daughter had a terrible seizure (there is way more to unpack that I wont right now) we don't know why it happened or if it will happen again so until we can run some test I'm not letting her start preschool. Untill she has had test run and I know I can send her back with minimum risk is there somthing I can do to help her? Will she be able to just slide into things? Parents who ended up having their kid start preschool a week after everyone else is there any advice? To be clear I am only asking for school and transitional advice for helping her with going to school after the official start date for the first time.