He thought it was unstable. Some do, some don't. But he gave the go ahead to use iOS 11 beta with the new build. If the url schemes did not work, he would have said so, and to stay off iOS 11. I just sent him an email to confirm.I also wonder about that as well. I did saw a message in the Testflight invite from Greg from Cromlent Labs that there were general issues with iOS11 and Launcher and that that Testflight version should fix compatibility with iOS11 in the Launcher app. But nothing about Setting URL schemes and if they still work. I think he is too afraid to mentioning anything about that nowadays.
The new schemes for iOS 11 are posted on the other thread.
Manually creating Settings launchers in app launching apps