Originally mentioned by @t3chguy at matrix-org/matrix-react-sdk#6520 (comment), this is meant to serve as a meta bug for various accessibility (a11y) issue that have been discovered surrounding the VoIP UI in Element web.

• The floating buttons that appear over a user's avatar in a Matrix 1:1 call have no labels, so as a blind user I'd have no idea which one is the one that opens the dial pad, they're all just "button".
• The call buttons vanish visually whilst the user's keyboard focus is on them (same for mouse focus).
• The in-call dial pad disappears when hitting tab, making keyboard navigation difficult.
• The backspace button in dial pad missing label "button"
  
• The call button on the dial pad is missing any label, it's just "button"