You could set a column value on submit in the table linked to the previous screen and use that value to add a visibility condition. So when the user submits, even if he tries to go back, he won’t see anything. Could you try this out ?
If I’m understanding what @MaximeBaker is saying, I think he meant not showing a different screen or tab at all. Just use the same screen, and set a value in the current table that controls visibility, so it hides the entry components and shows different components when the submit button is clicked.