Co-op flight on PC Xbox app?

Games Halo Infinite
1

Is the flight only available on Steam or can it be accessed through the Xbox app as well?

2

I’ve read from others that you can’t get in flights through the Xbox app.

I’m not sure if a source but it is 343 we’re talking about here though.

3

Steam or Xbox only:

https://insidersupport.halowaypoint.com/hc/en-us