So i decided to give back to the community and post a complete blueprint for playfab matchmaking using unreal, it supports party matchmaking with STEAM but you can use it for 1 player matchmaking without steam.
To any playfab staff seeing this, i dont need help haha.
i wont explain it because it is too long but the it is fairly easy to understand.
While it is not the best looking BP and probably still has some bugs i am sure it will speed up ur development process at least a few weeks.
https://blueprintue.com/blueprint/t9xeajj9/
People from playfab, if you want to stick this in a tutorial somewhere or just a page with a reference i dont mind giving u some actual screenshots of the thing, just let me know.
Hope it helps.