That’s a good observation, about that scene playing into Leia somehow knowing Rey’s parentage. I’m not sure removing it would help the film’s overly fast pacing, though, as you’d have to smash from “We must find Exegol” to the Falcon’s fuel thing being uncoupled in closeup.

That little scene does establish that Rey is following Luke’s journal which is important to understand.

Even without the idea that Leia “knows,” the scene shows Leia’s misgivings about the darkness and/or inexperience that Rey senses within herself and fears.