Geralt keeps watching, because that's just what he does sometimes. The unwilling. He seems to consider that for a moment before he glances off again.

"I hadn't realized some of us volunteered to fuck off to another sphere."

They're all unwilling, are they not? But perhaps some have found reason to start believing otherwise. He already knows Estinien seems to have grasped his so-called purpose here with both hands. Geralt has equally sidestepped that, which has left the elf none too pleased and also isn't his problem.

Kylo, at least, does not appear to give a shit that Geralt wants nothing to do with anything. Points in his favour, maybe. He's content with being ignored.