I have seen a lot of stories with Leia and Rey talking about Han and even with Leia and Poe. But Finn and Han were also friends and he was like Rey equally affected by his death. So how about something where both of them get to interact and maybe talk about Han's death and even Kylo since Finn was also part of the First Order. Just these two being friends.

(If you want to have background pairs I don't mind, as long as the focus remains on a Finn and Leia friendship/mentorship kind of deal.)