What are the patching rules?

LDJAM rules page is unclear on this, but what are the rules regarding patching a jam game post submission? We've been holding out on any patches, besides posting on itch for fullscreen support and changing like 3 variables in itch version for a slightly better balance. Leaving the original submission on LDJAM completely unchanged. I am under the impression that it is fair to other participants to only present original 72 hours work and not add anything during the rating time. But I see other teams releasing patches for their games and began wondering if that is allowed and to what extent? Performance optimizations? Bug fixes? Adding a few missing UI elements we didn't have the time to add during the jam? If it is allowed we would love to continue improving our game for a better experience. That would be super helpful if anyone could clarify this! Thanks!