As the matter of fact, why don't you update that page "Play Chess Variants with Jocly" which was listing all available games until last year?
The problem is that it is a matter of taste what 'available game' means. The Jocly applet itself allows you to select any game that is implemented, through the 'other jocly games' link. But this applet is not able to show rule descriptions or credits, which are also available for most of these games in the Jocly source package.
Therefore Fergus created separate HTML pages for individual variants, which embed the Jocly applet preconfigured to run the corresponding variant, with a rule description. The overview page you refer to contains links to those individual game pages.
In general the reason for there being no link to a certain variant in this overview page is that there doesn't exist such a separate HTML page for that game yet. Someone would first have to create those pages.
The problem is that it is a matter of taste what 'available game' means. The Jocly applet itself allows you to select any game that is implemented, through the 'other jocly games' link. But this applet is not able to show rule descriptions or credits, which are also available for most of these games in the Jocly source package.
Therefore Fergus created separate HTML pages for individual variants, which embed the Jocly applet preconfigured to run the corresponding variant, with a rule description. The overview page you refer to contains links to those individual game pages.
In general the reason for there being no link to a certain variant in this overview page is that there doesn't exist such a separate HTML page for that game yet. Someone would first have to create those pages.