One of the accessibility issues I see more often in iOS apps, believe it or not, is unlabelled elements. This happens especially for buttons with an icon but no title. In those cases, you need to configure an accessibility label manually.
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If you use SwiftLint in your SwiftUI project, there is a rule, by @rerycole34, for making sure that your images have either an accessibility label or are hidden for assistive tech because they might be decorative. Rule: https://realm.github.io/SwiftLint/accessibility_label_for_image.html
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
Make sure you support Dynamic Type up to the largest text size available. Take into account that there are five extra accessibility sizes available from the Accessibility Settings. It can make a huge difference for lots of users.
