where are items read from a session history traversal queue (https://html.spec.whatwg.org/#tn-session-history-traversal-queue)? the synchronous ones are applied in the "apply the history step" (https://html.spec.whatwg.org/#sync-navigations-jump-queue), but where are the asynchronous ones read?

https://html.spec.whatwg.org/#starting-a-new-session-history-traversal-parallel-queue step 2