Check out what’s coming next… in Safari 17.2 beta.
• Fullscreen API on iPhone
• updates to CSS Motion Path and Masking
• `cap`, `rcap`, `rex`, `ric` & `rch` units
• CSS Highlight API
• `name` attribute in `<details>` element
• `import` attributes
• WebCodecs HEVC
• preloading responsive images
• Fetch Priority
• `requestIdleCallback`
• login cookies copied over when saving website to Home Screen on iOS and iPadOS (just like macOS)
• blob partitioning
And much more!
https://developer.apple.com/documentation/safari-release-notes/safari-17_2-release-notes