On IOS, I can't install a PWA/add to home screen with a simple click. I think thats the bigger obstacle.
As opposed to an obvious button that says click me to install/download. (The usual Get it on the Appstore buttons), or Smart Banners[1]. The banner/button makes it crystal clear that I can click it to install the app. (Yes, you are correct you may need additional clicks to actually install, but by that time, you are in a familiar workflow).
1. https://developer.apple.com/documentation/webkit/promoting_a...
Most users don't know about it, and need a how-to guide - similar to what the posted link does.