I have an iPhone 16 and can just from dead to close to 50% in just about half an hour. Is your charger at least 30 watts and supports USB-PD? (I’m using a 65w charger, but remember reading somewhere the iPhone only uses 30w or a bit more)

MagSafe fast charging is only 25w, so charging by cable with a high enough wattage charger is always faster for me.

Apple reversed the web app decision FYI

https://arstechnica.com/gadgets/2024/03/apple-changes-course-will-keep-iphone-eu-web-apps-how-they-are-in-ios-17-4/