I think so. If we're talking about "out of the box" or what you'd find on average. As an Android dev for a few years now I think we get a lot out of the box and I get that web devs also use libraries or frameworks that have similar benefits. At that point it's comparing framework A's a11y vs framework B's a11y vs Android a11y.
Not an Android fanboy but I'm going to assume that the bigger (widely used/constantly iterating) "platform" (for a lack of a better term) has better a11y. And if there is a web framework that provides this (react?) do the majority of websites use it ? like they do native api's for native apps
(and this isn't even talking about the api's accessible to native vs web app)
