We don't have a way to do this natively, so you might need to look into third party options for this. I'm not aware of any services that offer exactly what you're looking for, but one option could be Board Export which allows you to export your checklists and there may be a way for you to work with the data to gather those that are not yet checked.
Hello Community! My name is Brittany Joiner and I am a Trello enthusiast and Atlassian Community Leader. In this video, I'll share my favorite Trello templates. Templates mentioned in ...
Connect with like-minded Atlassian users at free events near you!Find an event
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no Community Events near you at the moment.Host an event
You're one step closer to meeting fellow Atlassian users at your local event. Learn more about Community Events