I have phone number in below format
1-1xx-2xx-9565
Currently VO read it as \"One (pause) One x x
As of iOS 13 you can use a - NSAttributedString.Key.accessibilitySpeechSpellOut
as a accessibilityAttributedLabel
to make VoiceOver
read each letter of the provided string (or a range of string).
So for example:
yourView.accessibilityAttributedLabel = NSAttributedString(string: yourText, attributes: [.accessibilitySpeechSpellOut: true])