You can enable the possibility of providing assets for different appearances including light/dark modes and high contrast. As we've seen, that's valid for colors, but you can do the same for images too!
https://x.com/dadederk/status/1594724075590619138?s=20&t=XJrlJiGSCTR9sJC7XPZPjA
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When creating AXCustomContent objects for accessibilityCustomContent, you can specify the importance of the data. If it is high, it will always be presented by VoiceOver. You could potentially ask the user if that data is of importance to them.
You can add an observer to listen for changes in the content size category, in case it is more convenient than overriding traitCollectionDidChange(_:).
You can add your Accessibility Shortcuts to Control Centre too. One more quick access point and one more reminder to get you testing often and quickly. How to enable Accessibility shortcuts: https://x.com/dadederk/status/1583519154165800960?s=61&t=_fK9Muzu2MyFEeJLVQZcJg
