You make great points. The W3C has draft documentation on what success criteria carry over to mobile so this is the best resource I know of:

https://w3c.github.io/Mobile-A11y-TF-Note/

MDN also has a nice, quick checklist:

https://developer.mozilla.org/en-US/docs/Web/Accessibility/Mobile_accessibility_checklist

As far as actual cases, I will find a few of the newer ones and update the post with links shortly.