There are a ton of things to love about SwiftUI. But one of my favorites it's got to be the possibility of previewing Variants: the possibility of seeing your UI in dark/light modes, all dynamic type sizes, and orientations, side-by-side.
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Text Size is one of my favorite Control Centre controls. It lets you quickly change the Dynamic Type size, of the whole system. But also, you can now specify a different setting per app. Also, check out Dark Mode, Magnifier, Sound Recognition...
With regular buttons from UIKit or SwiftUI, you are all set. With complex views, headings, or table/collection view cells that, when selected, bring the user somewhere else in the app or perform an action, you'll have to add the button trait.
An alternative layout for large font sizes can be provided with Auto Layout by having three sets of constraints (common, default constraints, and alternative constraints) and activate/deactivate them depending on the content size category.
