If you’re disabled, chronically ill, or mentally ill, Lord Hephaestus is (of course) a great deity to build a relationship with. Still, many Gods can be worthwhile to reach out to for many things related to disability.
Hermes- Can assist with communication with medical providers, payment for medical bills and medication, safe traveling (especially for those of us who use mobility aids!), fertility treatment or reproductive care, finding lost items due to brain fog, and especially for terminally ill people and those of us with life expectancy-limiting conditions: navigating into and through the afterlife.
Apollo- Assisting with healing and recovery, mental health therapy, physical therapy, occupational therapy, treatments, medication, using art and music as a coping skill, and getting adequate and safe exposure to sunlight.
Asclepius- Following treatments and therapies, taking medication, help accessing medical care, safe surgeries, researching medical conditions, etc.
Asclepius is the son of Apollo and he represents the healing aspect of the medical arts; he was married to Epione (ηπιος, “soothing”) she personified the care needed for recovery. His daughters, the “Asclepiades”, are: Hygieia (“Health, Healthiness”), Iaso (from ἴασις “healing, recovering, recuperation”, the goddess of recuperation from illness), Aceso (from ἄκεσις “healing”, the goddess of the healing process), Aegle (“brightness,” or “splendor” the goddess of good health) and Panacea (the goddess of universal remedy). His sons, Machaon and Podalirius were highly skilled surgeons and medics during the Trojan war, and his son Telesphorus “the accomplisher” or “bringer of completion” was a little person, and in some myths, a child and minor God of healing from illness, particularly for children who frequently accompanied Hygieia. Many of these related deities might be more helpful for navigating specific circumstances!
Psyche- Goddess of the soul, can assist with overall wellness
Hypnos- Sleep and relaxation, insomnia and painsomnia, following good sleep hygiene, addressing nightmares and night terrors
Hestia- Being homebound, creating a safe environment at home, accessibility within the home
Dionysus- For matters concerning mental health, mad pride, celebration, intoxication, using substances to manage symptoms
Thanatos- Beneficial for those of us with life-limiting and terminal conditions, death positivity, navigating suicidal ideation, transitioning into end-of-life and hospice care, writing advanced directives
Hades- Particularly helpful for those of us with life-limiting and terminal conditions, death positivity, navigating suicidal ideation, transitioning into end-of-life and hospice care, writing advanced directives
This is a non-exhaustive list, I personally feel that your relationship with any deity and your experiences of disability can be intertwined in endless ways! Feel free to add others in the replies!