There are some missing scenes I would love to read, I’ll start with Pride & Prejudice:

Darcy explaining to Colonel Fitzwilliam why he needs to tell a deep family secret of Georgiana eloping to a random girl at the parsonage (I've written this one: https://bethanydellemanwriter.com/short-stories/i-need-a-favour/)

The walking conversation where Darcy is like, “So what would you think if the next time in Kent you stay at Rosings? HINT HINT HINT” and Elizabeth is like, “What is this dude talking about and why does he keep bumping into me in the garden?”

Lydia and Kitty chilling with the militia and planning cross-dressing level hijinks

Darcy extremely excitedly hurrying Georgiana to go change after her long journey so she can meet this girl he found wandering around his house.

Lady Catherine checking the shade pollution levels post marriage

Sense & Sensibility:

Edward telling Lucy he’s been disinherited and heavily hinting that it would be best for them all if she broke the engagement, while Lucy lies through her teeth about loving him so much

The duel between Colonel Brandon and Willoughby

Lucy "seducing" Robert while Robert is actually trying to steal her away from his brother.

Emma:

What Frank and Jane talked about when he pretended to fix the glasses and got everyone else out of the house. Also their fight on the Donwell Abbey day

Robert Martin’s proposal letter and second proposal. Just for the squees

Northanger Abbey:

The contents of Henry Tilney’s “secret” love letters to Catherine

Isabella Thorpe and James Morland’s break-up conversation

Persuasion:

The actual text of the first break up

Edit: I FORGOT MY BELOVED MANSFIELD PARK!

Edmund's proposal to Fanny

The real conversation between Mary and Edmund (not just as told by Edmund)

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Any more you would like to see? Do you have some links to good interpretations of these scenes?