Sorry – Making Weaver Xtreme meet the official WP Accessibility standards is a fairly major project. I really don’t remember which things weren’t included (or included for all parts of the theme), and the standards have been a moving target.
However “keeping accessibility in mind” vs meeting some specific standards are not the same thing. I believe, for example, that most of the standard accessible navigation methods work fine.
But the theme does not use SVG icon, for example. It can’t meet color contrast standards since all the colors are options.
You’d just have to check out how well navigation works.