FYI, the news that @nathank reported above has been fully confirmed by Apple.
In an act of brazenly malicious compliance with the European Union’s Digital Markets Act, which aims to bring more openness and competition to digital platforms, Apple has decided to kill PWAs in the EU with their upcoming Safari iOS 17.4.
This will prevent installation of PWAs on the home screen, use of push notifications, background sync, and interfere with offline storage and more. And it will have a global impact beyond just the EU, given that businesses will be far less likely to invest in Web Apps, and PWAs in particular, if iPhone users in the EU cannot use them.
I have to figure that this will be a major hindrance to many Discourse communities, and Discourse itself. If that’s the case for anyone, I strongly recommend that you fill out this survey from the Open Web Advocacy group. They are leading the fight against this, working to inform the DMA team of all of the implications of these and other policies on Web development. They are urgently trying to gather testimonials and data from businesses who will be affected by these changes, so that they can give the DMA better information to fight back.
Please visit this page to learn more, fill out their survey about how this impacts your business, and spread the word! It would be particularly excellent if Discourse could make its users aware of the upcoming change, so that they can each connect with OWA to explain how this affects their businesses and communities.