how do i access the flight on pc xbox game pass?

Games Halo Infinite
1

I dont have the game on steam i have it on gamepass and i have an invite to the flight but idk how to use it on the xbox app. been trying to figure it out but i cannot. can anybody help?

2

You have to redeem the key on Steam:
https://insidersupport.halowaypoint.com/hc/en-us/articles/7623568397332-Network-Co-Op-Flight-Steam-Installation-Instructions