I just went through this. At first the multi-platform seem the “right” way to go. But, multi-platform means your SwiftUI code is heavily peppered with #if os(iOS) since so many of the view modifiers for navigation do not exist on the mac. You are really irking in APPKIT and UIKIT in multi-platform. For my use case WAY more work than catalyst. The only reason I see for multi-platform is if you want to look like a Mac app, and basically have two different UIs. Or you need something not available in catalyst.
technomage
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