> Yes, it works, but Apple didn’t put too much effort in user friendlyness:
The iOS Settings app also has a search bar that you can use to find every submenu... Except for the "App Installation" subsection where you have to approve/manage alternative app stores.
Surely just a regrettable oversight by a singular engineer that unfortunately made it past QA. And that also wasn't caught when they reorganized a lot of the subsections for the iOS 18 beta. Unlucky. :)
Note: In non-Safari (e.g. Firefox) browser nothing happens when you click the button. You must use Safari directly.
Install process is as follows:
1. You visit the page and click the button.
2. You get a prompt, and need to confirm. You may also not get a prompt.
3. Go to the iOS Settings and below the first section (profile section) there is a button to give permission to a new app store.
4. Then you return to the browser and click the button again, and the app store installs and appears on your home screen.