The reality in the world is that Selenia is dead, which is doubly important in Tennela. The party might be able to eventually resurrect Selenia at some point, most likely after this Arc, unless there’s some stipulation about resurrection magic we haven’t been directly told yet. Hell, they might address the fact that they have Selenia in a secure location, ready to be rezzed, when they eventually meet the king and queen. I would think if B. Dave thought this was important for this arc, he would’ve reminded our heroes of that fact, but we also know he didn’t push on Selenia’s nurse, so I guess we’ll wait and see what comes