can play only halo:reach, not other games

Games Halo: The Master Chief Collection
1

i cannot select any other game/campaign from in-game menù.
xbox beta app, game pass ultimate pc edition version.

Halo Reach works (now) and i finished it. nothing else available.

2

Halo: Reach is currently the only title available for MCC PC. The rest (CEA, 2A, 3, ODST, 4) are expected to release throughout next year and will also be included with the Game Pass.