Yes you just need every website to use it, rather than fixing the client. Which is the 'boil the ocean' strategy mentioned in the comment you're replying to.
> ARIA can help when devs want to use the wrong elements for some reason or for custom controls.
But it can't. See this article.
See specifically https://www.w3.org/WAI/ARIA/apg/practices/names-and-descript... for details on naming. That has extensive notes and details for labeling elements correctly.
See https://getbootstrap.com/docs/5.0/components/ for bootstrap markup on creating accessible components.
There are plenty of other resources.