I mean, yeah, I still don’t understand why Luke abandoned him on Pasaana. But I don’t see how this line explains that? All this line tells us is that Leia and Lando are in communication, which just adds more layers of convolution, imo.
Like I said though, if we could flesh out the scene to give Lando some actual development, that would be swell; but that’s a separate issue from this one line.
EDIT: Half-agree with Dom. I don’t think it should replace the forest shot, but I do think that it doesn’t flow well and should be cut if we’re not going to include the TIEs with the lava shot.