Currently working through a map experience for mobile web and was hoping someone could provide me with a little clarity on accessibility guidelines. Specifically, what are the the most inclusive guidelines for zoom controls/pinch-to-zoom alternatives?

There's a ton of good literature out there that articulates guidelines for size and keyboard navigability of UI elements that exist on the map view (for example, zoom controls must be prominent within the tab order, must be a certain size, etc), but my question is whether these controls need to exist in the first place in a mobile view. After much digging through popular map-based experiences, they all seem to forsake these controls specifically in mobile breakpoints.

Given the prevalence of OS-level accessibility controls like VoiceOver and Zoom, are app-level zoom controls rendered redundant or useless?

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