Flower power asked:

Are we sure the challenge seen IS the immunity challenge for F6?

I just don't see an IN anywhere?

Hard to imagine they have time for a F6 Reward Challenge and this would be an EPIC challenge for a Reward as they added a 15 piece 3-D Slide Puzzle to the end (as seen in the Behind The Scenes of Challenge video).

In S22 the players were on the mat in front of all the puzzle step pieces with their backs to the challenge and Jeff Probst in front of them. The Jeff Probst stairs were on the Left side of the challenge and the Immunity Necklace stand was also on the Left side.

In this preview the players are standing on a mat sort of in the middle of the challenge. Looks like they are in front of the Left side of the second set of steps. From the Challenge Preview we know the steps are on the Right side of the Challenge which we also know from seeing Jeff on the Right side of the Challenge. However the players are facing the Left side of the challenge on the mat and Jeff would be standing in front of them on the Left side.

Seems strange to put the Immunity Necklace stand on the Left where Jeff is standing and then have Jeff observe the challenge from the Right side where the stairs are for him. Then come back down and walk to the left side to retrieve the Immunity Necklace but perhaps after the challenge is done they put the mat back next to the second set of puzzle steps and that's why the necklace in the Left and out of view from all the screen caps.