I happened on this while looking for something else and thought about this
thread:
https://lovefoodhatewaste.co.nz/how-to-store-pumpkin/
When I read about plastic wrap I thought that is a no-no though this does give some good suggestions.
Maybe you might try what I do with potatoes.
I cut them up the day before and to keep the potatoes from turning gray, I put them in a saltwater solution.
I got the idea from the airfryer that I got for Christmas.
The instructions for making fries said to soak them in
water with about 2-3 teaspoons of salt to a pan of water.
I hope this is something that will work for you as it has really helped me.