According to a Frameworks Engineer on Developer Apple Forum:
Animations and pan/zoom gesture do not work in widgets built with WidgetKits. Checkout https://developer.apple.com/videos/play/wwdc2020/10028/, where what works and doesn’t.
Throughout the WWDC20 Meet WidgetKit video mentioned above, Apple stresses that Widgets are not mini-apps, so they don’t support gesture based views (like scroll views) or animations. Widgets are meant to only have glanceable information. From WWDC20 Meet WidgetKit Video Transcript:
These widgets are not mini-apps. We do not support scrolling within the widget, interactive elements like switches and other system controls, nor videos or animated images.
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