Allison,
I updated/edited an earlier comment, with a question about "Cultural Humility".
I'm not sure that all current Peer Support participants are 'equally trained', but few consider themselves "mental health professionals".
We were all 'trained' when I became active in "Peer Suppport", and few, if any of our peers hired to 'staff' the program referred to themselves as "Peer Support Specialists", at that time. (We all were 'specialists' -having been 'trained', but, based on an 'empowerment model'-which I believe comes from the "community organizer" model of Saul Alinsky ["peer" being "Equal"] , and 'Social Change' models.)
The "Trauma-Informed, Risking Connection, Intentional Peer Support" model that I was trained in, seems quite similar to the [Police] Intentional Peer Support programs in Boston and Cambridge [Massachusetts] and recently a number of North Shore [Massachusetts] municipal Police Departments (I assume, in lieu of CISD [Critical Incident Stress Debriefing]), as the Boston & Cambridge Departments are/were affiliated with the national On-Site Academy which also now provides Crisis/Respite services for both First Responders (Police/Fire/EMT-Paramedic) AND [now] "Human Services Personnel" from anywhere in the world [previously, it was just for First Responders-from the USA; and they had EMDR certified clinicians].