When thinking about accessibility labels and values, it is easy to miss adding information or state that are represented by little visual cues and icons: a checkmark indicating something has been played, a down arrow indicating a downward trend...
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When using Voice Control, say: "Show names". You'll see all the accessibility labels for interactive elements overlaid on the screen. It will help you identify labels that can be improved, or actually missing. Labels are not just for VoiceOver.
Images can automatically scale for accessibility content size categories, by setting the adjustsImageSizeForAccessibilityContentSizeCategory property to true, for any UIImageView you'd like to get its size adjusted. https://developer.apple.com/documentation/uikit/uiaccessibilitycontentsizecategoryimageadjusting/adjustsimagesizeforaccessibilitycontentsizecategory
Check isReduceTransparencyEnabled to lower transparency. A great example is Spotlight. Not only transparency is removed but it keeps the main color of the background, it feels personalized and contextual but reduces noise and improves contrast.
