Test manually. Familiarise yourself with different assistive technologies. I find it useful to start with VoiceOver but check out Voice Control, Full Keyboard Access, and others... Remove friction, configuring shortcuts can help. Merry Christmas!
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Accessibility Labels are not just for VoiceOver, and Accessibility User Input Labels are not just for Voice Control. The latter will also help Full Keyboard Access users to find elements on the screen by different names. Good API design!
Accessibility labels might not be the best input labels, used for example to find or interact with elements with Voice Control or Full Keyboard Access. In those cases, you can provide accessibility user input labels.
Attributed accessibility labels are a thing! They'll let you specify (for the whole accessibility label or a portion of it) VoiceOver's language, to read punctuation marks, spell it out, correct the pronunciation, or even change the pitch. @RobRWAPP has a very detailed blog post explaining each one of these attributes: https://mobilea11y.com/blog/attributed-accessibility-labels/ And here's Apple's official documentation for them: https://developer.apple.com/documentation/uikit/speech-attributes-for-attributed-strings
