We do expose AXDOMIdentifier, but it's only called by tests and not real AX clients, so we shouldn't spend the time caching and updating it unless logging is enabled (for debugging purposes).
<rdar://problem/99259089>
Created attachment 461960 [details] Patch
Created attachment 461961 [details] Patch
Committed 253917@main (95cb4d36cc5a): <https://commits.webkit.org/253917@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 461961 [details].