FL has a P/DH which is essentially what 2020TXCATCH describes. The one caveat is once the P/DH comes out of the game as a P and assumes the DH role, he cannot reenter the game defensively. You have to decide before the game that you want to use a P/DH and cannot use a DH for someone else.
https://www.fhsaa.org/sites/de...ode-3257/dh_rule.pdf
Unlike the scenario above where the SS is playing like Ozzie, but swinging like Harriet you cannot decide in the 6th inning you want that position to be SS/DH.