Thanks for being part of the GitHub Community Forum! I’ll help as best I can.
You actually already can find your forks of a repo in the way you describe. If you go to the repo’s main page, in the upper right corner, next to “Watch” and “Star”, you’ll see “Fork”. If you click on the number there, that will take you to a page where you can see all the forks of that repository, listed by username.
If that’s not quite what you’re looking for and you’d still like to submit a feature request, for now, the best way to submit bug reports or feature requests is via our contact page (github.com/contact). GitHub Staff will see and respond to those requests there. You can include a link to this forum post in your message so that you don’t have to write out the entirety of your idea again.