I'm not on my DAW right now.... but, in my DAW, as I go in to select the synth I may want to use, some of the synths are in subgroups on that list.
If a synth or other is in a sub group, there will be an arrow beside it's name to show there is another menu level to open.
I don't know how some of the things got into the sub levels of the menu but they did. They open fine in those levels.... but you have to look for them. Some of my stuff was "missing" until I looked in some of those menus.
See if that is the case for you as well.
BTW: some of my FX are the same way.