Triage was previously announced to be open to any site which wanted it. Now it seems Physics has an active Triage queue. However, the Help Center article listing all the review queues still claims that Triage is Stack Overflow specific:
Triage – Stack Overflow only - 500 reputation. The primary goal of Triage is to quickly sort questions into groups: good as is, needs community editing, or should be closed/flagged.
(Side note: the link there is to Stack Overflow's article on Triage, and attempting to manually change the URL to be on Physics results in a 404)
Please update the Help Center to reflect that Stack Overflow is not the only community with a Triage queue.