OP - IF any seats are available in F at 24 hours you MAY be offered the upgrade when you check in. The best way to see these offers is to check in with the app. Even after check in you can go back later and go through the check in process again to see if anything has changed. Occasionally something will open up because someone changes plans.

For this route with this aircraft there is a very low chance of any F seats being available at 24 hours before departure, however.