Welcome to the club no one wants to join (parent of a T1), and congratulations that your daughter has already been diagnosed on the spectrum.
My daughter is also on the spectrum. Way back when, no practitioner believed me about this as we looked into getting our daughter diagnosed, because "only boys are autistic", or "but she can talk and is 'social'!"
Everyone on this forum can help you MUCH MORE with the parenting diabetes aspects than I.
Just want to give you your due respect for the challenges and joys you have already faced by parenting an autistic child.
As the saying goes -- and it's true for each of these conditions --
When you have met one person (on the spectrum / with diabetes), you have met ONE PERSON (on the spectrum / with diabetes).
Each of these conditions vary day by day, as well as from individual to individual.
But you will find much support and helpful info and people for you and your daughter here.
We are here to listen and help where we can.