What issues are you having? Keyboard interaction works, button elements are used and they're labeled correctly.
A lot of the basics are in place correctly but I've run it through a couple of our tools we use for accessibility audits and it's failing on quite a few things. The major ones being color contrasts and there is more on the subpages where some of the designs are not accessibility-friendly so devs made a few shortcuts. You see many issues even on quick check tools such as https://wave.webaim.org/ if you go through the pages.