I’m hypo and suffer chronic constipation that led to severe digestive disorders. Your thyroid dose may be incorrect. How long since that was checked. Also, even when your tsh lies in-between those normal numbers does not mean for everyone, yout thyroid is good. My normal is very close to the low number on the labs reference range. If I sit in the middle or closer to the high end I get all sorts of symptoms.
I would talk to the person in charge of your dose, PCP or Endo and I would make an appointment with a gastroenterologist. If you’ve had a colonoscopy, go to that doctor. Best of luck.
The recipe someone suggested would just kill my gut because I’m very sensitive to fiber and that for me is way to high in fiber.