Autobiographical components of fictional novels

Cafe Society
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In other words, not memoirs or thinly veiled autobiography, e.g.:

-Scarlett O’Hara scandalized society by dancing at a charity ball for the Confederacy while still in widow’s weeds; Margaret Mitchell became a social pariah for dancing a Danse Apache [work safe AV link] at a somber Junior League fundraiser for WW1 orphans.
Scarlett always felt she was an embarrassment to the socially prominent devoutly Catholic mother she idolized, ditto Mitchell with her own mother; Scarlett had to become head of the family when her mother died of typhoid and her father couldn’t deal with it, Mitchell had to to do the same when her mother died of Spanish flu.
Scarlett stuns Atlanta society again by marrying Rhett very soon after her second husband’s death, while Mitchell embarrassed her family terribly first by divorcing her husband Red Upshaw (even though they couldn’t stand him and disapproved of the marriage) and then again by remarrying almost immediately to his best friend, John Marsh.
The character of Grandma Fontaine in the novel- an old warhorse who survived the War of 1812 and the Creek Wars and all kinds of privation and poverty before becoming the embarrassing old matriarch of a rich family and consequently has a pragmatic less-than-sympathetic “stop whining, get off your butt and pick your own damned cotton!” attitude towards her spoiled grandchildren and neighbors in the ruins of the war, was very closely based on one of Mitchell’s old in-laws who had similar attitudes to her spoiled grandchildren in the Depression due to her own youth in the post Civil War ruins.

Charles Dickens worked the involuntary servitude of his own youth from when his father was in debtor’s prison into Oliver Twist and other works and reincarnated his father into at least two or three characters.

John Grisham based Time to Kill on a real rape/murder case in which, like Jake Brigance, he vomited during one recess after hearing details of the rape.

What are some other famous autobiographical scenes in novels with fictional characters?

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Much of Philip Roth’s early oeuvre is generally autobographical. Goodbye, Columbus was published shortly after Roth’s analyst published a case study of Roth; with the publication of GC, Roth was instantly recognizable.

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Beverlyi Clearly’s two autobiographical works “A Girl from Yamhill” and “My Own Two Feet” describe many life incidents that she used in books.

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George Orwell’s Keep the Aspidistra Flying bears some important resemblances to Orwell’s own life at the time, when he was, like the book’s protagonist, a struggling writer who worked in a bookstore. And it’s clear that many of Orwells ideas about literary society and about the English class system are expressed in the thoughts and words of Gordon Comstock.