You should really try to support Dynamic Type. If you can’t for some reason, and you want to fall back to the Large Content Viewer, you can do so. I’d limit it to “sticky” bars. Maybe you have a custom tab bar, navigation bar, or similar?
Check the UILargeContentViewerItem protocol. Most UIKit components conform to it already. You'll just need to set showsLargeContentViewer to true and add a UILargeContentViewerInteraction to your component.
https://developer.apple.com/documentation/uikit/uilargecontentvieweritem
You may also find interesting...
Ever wondered what the ideal width is for labels so the text is readable? Well, it depends. But readableContentGuide has you covered. You can configure the optimal width independently of Dynamic Type size or Size Classes. https://developer.apple.com/documentation/uikit/uiview/readablecontentguide
You may have noticed that navigation/tool/tab bars don't scale with large Dynamic Type sizes. It would take too much space from the screen leaving very little real estate for the actual content. A tap and hold will show the Large Content Viewer.
If you need to send announcement notifications that can step into each other, they will by default, interrupt ongoing announcements. But you can pass attributed strings as parameters too, letting you specify announcements to be queued.
