To run java games, the jvm must be installed, that is the entire purpose of java.  But requiring software to run the game is explicitly banned, so are all libgdx, lwjgl, and other java game frameworks or graphics engine based games banned unless compiled?

Probably. There are ways though that you can build java files to run on the web, but you may need to search around for a builder or a host.

I created a game in Libgdx and my previous jam accepted it. It runs smoothly on the web. Check it out on my page. The game is called Orbo. What kind of game must be submitted here? I thought we could submit a browser build.

If you "pack" JRE to exe -> no external program required.

There is so many ways to bypass this.

Do not forget Unity packs dlls what is same what I am doing in 1st statemtnt.

This is my first game jam and my first java game, any tips?