Players will need to find another vessel to vent out their never-ending hate towards Gale.
Players in Baldur's Gate 3 will no longer be able to permanently destroy dead characters by yeeting them into a chasm, as a recent update has changed this mechanic.
She is captured by some tieflings not too far down the road from Asterion and Gale. I think there may be another fork you can go down the main path with, so it might be possible to miss her. I'm in Act II first play through and am playing slowly enough that that was about a month ago, so it's a little fuzzy.
I missed both her and Gale in my first playthrough and while Gale never appeared anywhere else, Lae'zel does show up a bit later. Albeit kind of randomly.
There's a conversation that pretty much plays out as if you had her the entire time, then afterwards you have the whole "hey wait you were on the ship too" thing and she can join you.