1. “She adopted her friend’s child.”
Is this a reference to Alcott looking after her sister’s daughter entrusted to her? See point 9 “Louisa May Alcott never had children, but she cared for her niece” of “10 Little Facts About Louisa May Alcott”.

2. On the other subject matter Iris raised.

Per “The Two Loves of Louisa May Alcott” of New England Historical Society, she had a crush on both Emerson and Thoreau:

“Louisa May’s crush on Thoreau competed with her interest in Emerson. Her family moved to a cottage next door to him. As a teenager, she often borrowed books from Emerson’s library and left wildflowers on his front step. He pretended he didn’t know where they came from.”

And the short-lived arguments for her being a lesbian have been superseded by the arguments of her being transgender, see NYT’s “Did the Mother of Young Adult Literature Identify as a Man?” of December 2022, from where a few salient excerpts follow below.

So while: ‘Louisa May Alcott balked when her editor asked her to write a book for girls. “Never liked girls or knew many,” she journaled, “except my sisters.”’ (Pertinent to this appears to be point 6 “Louisa May Alcott wrote Little Women to help her father” in “10 Little Facts About Louisa May Alcott” by way of explanation of why Little Women came about.)

And while there is:
‘Alcott did speak of having “fallen in love” in her life “with so many pretty girls and never once the least little bit with any man.”’

There is also:
‘Alcott also explored male homosexuality, cross-dressing and bisexuality in short stories like “My Mysterious Mademoiselle” and “Enigmas.” She was affectionate with many young men, particularly Alfie Whitman and Ladislas Wisniewski, who jointly inspired Laurie of “Little Women,” but scholars disagree on whether she regarded them as romantic interests.’

And then there is this:
‘“I long to be a man,” she wrote in one journal entry. “I was born with a boy’s nature,” she said in that letter to Whitman, and “a boy’s spirit” and “a boy’s wrath.” As a child, she didn’t “care much for girls’ things.” Recall that as an adult, just a few years from death, she saw herself as “a man’s soul, put by some freak of nature into a woman’s body.” Why not take Lou at his word?’

Thus that would make her a bisexual (or homosexual or straight) transgender male.

Per such arguments that she was in actual fact trans (merely before the term was coined), she’s then being lesbian-washed by arguments claiming her to be a woman and lesbian.

Accusations of washing seem to reasonably apply to multiple groups then, considering additional statements by Louisa (who preferred to be known as Lou etc) left out in Iris comment.

It’s been a long time since I’ve watched the documentary, but I remember it being fabulous. That said, I’ve read her journals, letters, and well-researched biographies. While we can never know for sure, it does seem like she had feelings for Ladislas Wisniewski in her personal writings. But it’s hard to know for sure. It is certainly possible she was bisexual or a lesbian.