well resolved should work but only if you have set the Resolution field when closing the issues which you absolutely should do. I expect you are not so you could try this...
status changed to resolved after 2019-10-01
change your date as desired.
but again, i recommend you focus on the Resolution field solution going forward. there are a number of threads explaining this so you the Search bar at the top of the page.
Introducing Jira Cloud for Excel Here at the product integrations team at Atlassian, we are thrilled to announce the new Jira Cloud for Excel add-in! This add-in lets you export Jira data directly ...
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