Shortcuts does not log when you last ran them, so unless you have added something to each shortcut to log it’s use, there is no data to work with.
I had about 1200 (maybe more) shortcuts a few years back. I used BART to back them all up, deleted them all and then have restored the ones I wanted as I needed them.
Definitely an extreme approach, but it was guaranteed to give me a clean start without losing anything.
Hope that helps.