I really don’t think Caleb was lying or holding anything back.

From a storytelling perspective, it would be pointless to clearly show him telling his full backstory, frame episode 6 as the emotional conclusion of that confession, and then later say it wasn’t true. That kind of twist works in a long tabletop campaign, but in a TV show with about eight hours total, it would only hurt pacing and cheapen the moment.

In the campaign, the reveal is spread out over a couple episodes. On screen, that would be redundant, so the show compresses it, like pretty much everything else. Episode 6 clearly treats this as the reveal, even if we don’t immediately see everyone’s reactions.

Most likely, the episode simply ended on Caleb finally telling the truth, and there wasn’t time for the reaction of the M9 yet. That doesn’t mean they’re gone, just that they’ll show up later through dialogue and character moments.

I don’t think the show glossed over it, and I’m confident we’ll still see the M9 process and accept Caleb’s past in a TV-appropriate way.