If you installed fop2admin, you have a fop2 buttons menu in freepbx that will list all buttons that are found, those includes trunks, parking, etc. And you can also setup groups, if you did setup groups and assigned them to users, that is the reason of the limited view. I cannot tell you how to bring back your buttons, because I do not know what you have installed, what you configured, etc.. In any case, you can uninstall the fop2admin freepbx module and try again with the standard autoconfigurations. Or uninstall and install again.
Best regards,
