This page talks about the Feedback Assistant app for developers, and how it's the preferred way to submit feedback. But I didn't see anything obvious about how to get it. So I look for it in the app store. Nothing.
About 5 minutes of searching brings me back to a well-hidden sentence on that page saying that it's on the home screen if you have a Beta version installed, but you can enable it on the publicly released versions by "installing a beta profile".
I have no idea what that means. I can find no info on the web or the searching the developer site about how to "install a beta profile". I find instructions for installing Beta versions of iOS, but don't see anything about how to get the app without actually installing a beta OS.
I did find a (sketchy as F...) website called betaprofiles.com <--- (don't click) that downloads and tries to install software on my Mac. (To which I said 'ell no). Seems an opportunist noticed this gaping vacuum that Apple created and stepped in to "fill it". I wonder how many people have gotten malware because of this lack of documentation.
Sorry, frustrated as heck.
OK, finally stumbled on the instructions in a MacWorld article. I guess I've started downloading "the profile", it will supposedly notify me when it's finished downloading, but I can't confirm that's actually happening. And I still don't even know what a "profile" is or what will happen if I "install" it.
Seriously, this info should be easier to find. Searching these terms should bring up an informative article on apple.com at the top of the results, not some shady (AFAICT) malware site, and the best info being on MacWorld.