Billie Lourd mentions Leia in TROS in this, but it really should be read because it’s just a very nice and touching piece in general about her relationship with her mother - https://time.com/5720323/billie-lourd-princess-leia-essay-carrie-fisher/
An illuminating and poignant article, that mate - nice one on posting it up.
From the 2017 article at Vanity Fair - Cover Story: Star Wars: The Last Jedi, the Definitive Preview - on Carrie Fisher’s planned larger role for IX, it being ‘her film’ (in the context that TFA had Harrison ‘front & centre’, and TLJ had Mark ‘front & centre’), before her passing…
'Fisher had a bigger role to play in The Last Jedi — General Leia Organa logs significantly more screen time in Episode VIII than she did in VII. Isaac, who filmed several scenes with Fisher, said that, like Hamill, she delivered a rich performance, giving her all as an actor, rather than treating Leia’s part as an exercise in feel-good sentimentalism. “We did this scene where Carrie has to slap me,” he said. “I think we did 27 takes in all, and Carrie leaned into it every time, man. She loved hitting me. Rian found such a wonderful way of working with her, and I think she really relished it.”
For his part, Johnson quickly formed a deep bond with Fisher as a fellow writer, spending long hours with her at the eccentric compound she shared with her mother, Debbie Reynolds, in the Coldwater Canyon section of Beverly Hills. “After I had a draft, I would sit down with her when I was working on re-writing,” he said. “Sitting with her on her bed, in her insane bedroom with all this crazy modern art around us, TCM on the TV, a constant stream of Coca-Cola, and Gary the dog slobbering at her feet.” (For visuals on this characteristic state of affairs chez Fisher, I highly recommend Alexis Bloom and Fisher Stevens’s HBO documentary, Bright Lights: Starring Carrie Fisher and Debbie Reynolds.)
Fisher completed her part in Episode VIII late last summer, when principal photography on the film wrapped. “She was having a blast,” said Kennedy. “The minute she finished, she grabbed me and said, ‘I’d better be at the forefront of IX!’ Because Harrison was front and center on VII, and Mark is front and center on VIII. She thought IX would be her movie. And it would have been.”’