Hi Julie -
You've already started, by taking the first step to reach out to the wise folks @rotation.org!
The first thing that struck me was that pre-pandemic, you had 17 kids under the age of 8 who didn't attend Sunday School ... yet several of those families left to attend church that offered SS, which to me indicates that those families are yearning for faith formation. Carol & Amy's suggestion of communicating directly w/ the families is a great second step. If it takes hold, which I bet it will, the leadership team is bound to take notice. One last thing - if the leadership team truly doesn't participate, you can form/mold the program which you feel will resonate best! Hopefully one or two parents will be willing to help, and you have the beginning of a program. Tap into the great lesson plans available here and you're on your way.