Update:
My "Track Cycling Stopwatch for iPad" is now available again. I updated the code to work for iOS 13 which caused crashes. For what it's worth, the app worked fine, but some of the code features I was using were deprecated (no longer supported) in iOS 13. That's what caused the instability for people who upgraded to iOS 13.
I just got the message from Apple that it was approved. If you don't see it in the store now for download, give it an hour or so to be put on servers around the world and made available.