Welcome to WikiTree! Sounds like you have done a lot of good work on your family tree already. What are you wishing you could find about your cousins?
There are several ways WikiTree protects living people. It is possible that your cousins are here, but partially hidden for privacy. Or are you trying to find their emails so you can invite them?
Let us know what specific information you seek, and maybe we can help out. And welcome. -NGP