Ahem. If you are looking for recent queer Arthurian fiction, please allow me to eagerly recommend my favorite novel of the past several months and indeed, possibly of the summer (published in May 2023):
It was literally written by a PhD student dissertating on queer interpretations of Arthuriana, and it's really, really good. It's funny, but it's angry, and it's savage, and it pulls no punches, and holy fuck the ending made me CRY (in a good way). There's gay Sir Lancelot (and also gay immortal secret agent Christopher Marlowe), and African/black Sir Kay (the protagonist) and a Muslim heroine and a lot of pitch-black satire about post-Brexit Britain in a near-future era of climate collapse, and questions about how the Arthurian legends can have relevance in this world, whether we should in fact hope for King Arthur waking up to Fix Everything (this book says uh no, we fucking shouldn't) and how those myths intersect with and inform the fight to create a new world, even in the ashes of the old one.
Likewise, if you will allow me to toot my own horn: I wrote a lengthy (as in 5,000 words with bibliography) meta of the Dev Patel The Green Knight film, which focuses heavily on its queer readings vis-a-vis the poem and how this fits into a larger tradition of queer interpretations of both SGGK and the Arthurian legendarium: