Hi Ben,
You can use the selection helper widget to run a microflow to determine which record to select in a listview.
I'm not sure how your current page is setup, but you could associate the specific record to a non-persistent entity and pass that to the page. Then the non-persistent entity will be a parameter in the microflow run by the selection helper widget and you can determine which record to be selected.
https://appstore.home.mendix.com/link/app/27519/
Hope this helps!