(Sourced from the Reddit thread) In most books the MC has a disability; in a few books a side character who plays a major role in the story has it.

• A Breathless Place by Harper Bliss — [Suicidal Ideation] (Dunno if a conventional disability but I consider it so: one FMC has extreme suicidal ideation. Major plot driver.)
• A Heart Full of Hope by Cheyenne Blue — [Prosthesis] (leg)
• A Masc for Purim by Roz Alexnder - [Progressive vision loss] (Narrated from perspective of MC without disability)
• A Wish Upon A Star by Jeanie Leavig — [Autism] (MC's child has autism, major presence)
• Alice Rue Evades the Truth by Emily Zipps [Multiple Sclerosis]
• Almost Perfect by Lulu Lucille [Wheelchair]
• Ask Me Again by EJ Noyes — [PTSD] (Must read the prequel Ask, Tell; detailed rep; entire story is about recovery)
• At All Costs by Micheala Lynn. [Wheelchair] (Wheelchair user is angry disabled stereotype, poster does not recommend.)
• Bring Holly Home + Keep Holly Close by AE/Amanda Radley — [Amnesia]
• Carmilla and Laura by SD Simper — [Wheelchair]
• Cleat Cute by Meryl Wilsner — [ADHD] (I haven't read it but some blogs indicated that the character's POV narration majorly reads like someone with more disorganized thoughts / ADHD)
• Don't Let Go + Stay With Me (presumably since sequel) by Sheryl Wright — [Speech Impediment, Concussive head trauma]
• Fitting In by Amanda/AE Radley — [Autism]
• Fortune Favors the Dead by Stephen Spotswood - [Multiple Sclerosis]
• Godkiller by Hanah Kaner [Prosthesis] (leg)
• Gold by EJ Noyes [PTSD, Chronic pain, limp] (Major skiing accident)
• Hearing Red by Nicole Maser — [Blindness]
• Just A Touch Away by Jae [Aphantasia] (Not a plot driver or impediment)
• Just Physical by Jae [Multiple Sclerosis] (one person commented book's description and their observation of RRMS symptoms don't match)
• Like A Power Play by Elle Sprinkle [Rheumatoid Arthritis]
• Make You Mine This Christmas by Lizzie Huxley-Jones — [Autism; Mobility Issues] (Autism: not realized; Mobility Issues: Ehlers-Danlos syndrome - Connective tissue condition)
• Making A Comeback by Julie Blair [Blindness]
• One Last Stop by Casey McQuiston — [Location restriction] (Not a disability, but one FMC must remain restricted to a particular physical space.)
• Passion Marked by Ophelia Silk [Postural Orthostatic Tachycardia Syndrome (POTS), Cane use]
• Redsight by Meredith Mooring [Blindness]
• Scaredy Cat by Robin Alexander — [Phobias] (one FMC has major phobias; humorous, low angst)
• Shameless Expectations by Adrian J Smith — [Agoraphobia; Insomnia; PTSD] (extreme insomnia, PTSD and doesn't leave the house)
• Sprinkled In The Stars by Violet Morley — [Autism] (MC's child has autism, major presence)
• Stay With Me by Sheryl Wright — [Speech Impediment] (presumed, since the sequel)
• Survival Kit by AH Haga [Myalgic Encephalomyelitis/Chronic Fatugue Syndrome, wheelchair]
• The Flying Ship by Jem Milton [Prosthesis] (leg)
• The Hollow Witch by Mary Borsellino [Deafness]
• The Loudest Silence by Olivia Janae — [Deafness] (Person with diability starts out stereotypically angry which eventually goes away)
• The Roommate Arrangement by Jae — [Prosthesis] (eye; light, fun; one of my favs)
• The Snowball Effect by Haley Cass — [ADHD] (It's a consideration in the story but doesn't constrain story-telling.)
• The Unbroken by C.L. Clark — [Chronic Pain; Mobility Issues]
• The Undetectables by Courtney Smyth [Chronic Pain]
• Time and Time Again by Chatham Greenfield [Irritable Bowel Syndrome]
• Under The Sitka Sky by Violet Morley — [Seizures]
• What the Heart Sees by K.C. Luck [Blindness]
• Who'd Have Thought by G Benson — [Alzheimer's; Asperger's] (Alzheimer's: minor character, short but potent rep; Asperger's: one FMC is neuro-atypical, possibly on the spectrum, but it's not explicitly stated; affects personality and interactions with the other FMC but doesn't constrain story-telling; one of my favs; humorous, fun, light)
• Wounded Souls by RJ Nolan — [Emotional Trauma (primary or secondary); Prosthesis] (Emotional Trauma: covert plot point; Prosthesis: MC & major side character, leg)