Hello!
Is your FOP2 registered? if it is unregistered, then you can see only the first 15 buttons from the FOP2Buttons list, mostly extensions.
Best Regards
Hello!
You can create groups with specific extensions and give your users access just to those groups and not to all buttons.
Or you can just disable those extensions you do not need to be visible in fop2 in Buttons settings. Each button object has "enable/disable" slider.