Dynamic Type on the Web furbo.org

Craig Hockenberry:

This site now supports Dynamic Type on iOS and iPadOS. If you go to System Settings on your iPhone or iPad, and change the setting for Display & Brightness > Text Size, you’ll see the change reflected on this website.

With the important caveat this only applies to iOS-derived devices — not even Macs — it seems trivial enough to implement in a way that preserves the Dynamic Type font size but permits flexibility with other properties. Apple added this in Safari 7.0 along with a wide variety of other properties — you can set headings to match system sizes, too — but I cannot find many places where it is used even today. (The WebKit blog is one.) Is that a result of poor communication, or perhaps poor focus on accessibility? Or is it just too limited because it is only used on one set of platforms?