If you want to do a late submission, simply let us know. The Itch.io jam format has an end time, but there are ways to permit late entries regardless.
Viewing post in I might not be able to submit my game in time
What's the Itch.io URL to your game that you're going to submit? Once it's on Itch.io, we can go to the game and send you a link to add it to the jam. It has to be done individually per submission.
(see https://itch.io/updates/enhancing-jams-late-submissions-and-entry-editor for details)
Follow this link to submit: https://itch.io/jam/326806/add-game/1835618/3195482?token=H8EUx4S7jE5fuZjLFRgaFb...
I guess we can try again? Here is a newly generated link.
https://itch.io/jam/326806/add-game/1835618/3195482?token=H8EUx4S7jE5fuZjLFRgaFbqpHE