Actually there is an indication that Wyll and Karlach get together. In my last gameplay with origin Gale. I romanced Karlach; however, because you are playing origin Gale you cannot ascend your partner at the epilogue, the games considers y’all’s relationship over.

With one of the comment lines, she mentions that it’s been easier to be In Avernus with someone she loves. This is said after you “wish” things had been differently between you two and then ask how’s she is holding up. So, my conclusion is that she fell for Wyll and Wyll for her while there and my god Gale couldn’t be happier for them.

NOW as a new god, I should’ve gotten the option to fix her heart and give them both the happily ever after they deserve together. I am forced to assume this is a Larian oversight or AO divine restriction…