I think I had mentioned this in the past and if memory serves well @megamaddu concurred:

aria attributes are being handled like data attributes. That is, one can supply an Object String as _aria to most (all?) basic components and they will be correctly injected.
But contrary to data- attributes, the set of valid aria- attributes is well-defined and not free for the author to choose.

As a reference: Here's the list:

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