Tracking: Web interface isn't accessibility friendly

I'm looking at ReDoc v2 (nice job by the way) but I'm running into problems where the interface isn't very accessible. Looking at the "Accessibility" tab in Firefox, it's mostly div and span tags with onClick events attached that are tripping me up. In order to be useful to more people (and for us to potentially adopt this at work), it would be great to review these and see if some of them could be implemented with some alternative markup or made focusable with tabindex.

Work items

• #1280 Make Response status accordions clickable
• #1281 Enable "Copy", "Expand All" and "Collapse All" to be focusable
• #1282 Make request content type dropdowns accessible
• #1283 UI review/update on method/path dropdown
• #1330 Cannot access response schema details
• #1331 Response samples can't be selected
• #1332 Make API endpoint selectable/focusable
• #1341 Make callbacks expandable
• #1342 Right hand bar body samples can't be expanded/collapsed
• #1410 All non-text content has a text alternative (WCAG 1.1.1)
• #2405
• #2406
• #2407
• #2408
• #2402

This tracking issue is organized around the linked accessibility work items, with several completed and several still unchecked. Start by reviewing the remaining WCAG 1.1.1 item and the blank work items, then consider the tracking work complete when each remaining accessibility concern has a defined and completed item.