In a repeating group a user selects a cell which navigates them to a new page. Note: my app is a one page app so this works by changing URL parameters.
On that new page if the user presses back is there a way to scroll back to the selected cell on the previous page?
Yes. If you have the RG that shows results in a group and make it not visible via conditionals based on the URL parameter for selected entry not being empty, once the user presses back button the url parameter should be empty, the group containing rg should become visible again, and rg should be in same position as it was prior to selection.