One change in iOS 17.4 is that the iPhone now supports alternative browser engines in the EU. This allows companies to build browsers that don’t use Apple’s WebKit engine for the first time. Apple says that this change, required by the Digital Markets Act, is why it has been forced to remove Home Screen web apps support in the European Union.

Apple explains that it would have to build an “entirely new integration architecture that does not currently exist in iOS” to address the “complex security and privacy concerns associated with web apps using alternative browser engines.”

This work “was not practical to undertake given the other demands of the DMA and the very low user adoption of Home Screen web apps,” Apple explains. “And so, to comply with the DMA’s requirements, we had to remove the Home Screen web apps feature in the EU.”

So apparently Apple is a special snowflake that cannot fathom implementing something that Android has had forever (installing PWAs with third party browser engines).