Don't know why its happening but we hope you enjoy!
The same happened for ours! Apparently it can take a few hours sometimes – as long as there’s a banner on the game’s page itself that says “Submission to RPG MAKER 2025 GAME JAM,” you should be good. (I hope.)
You can also click on the banner to go to the submission rating page for the game – I took a screenshot of ours just in case.