Review Effects of traditional Chinese mind-body exercises for patients with chronic fatigue syndrome: A systematic review and meta-analysis 2023 Kong et al

Tai-Chi seems to me among the most optimal and safe forms of general exercise, and I did give it a good go about 20 years back.

But its effects on my ME/CFS was no different than any other form of exercise or physical activity, however gentle and carefully titrated.

Also tried yoga 35 years ago, including the gentlest forms, but same result.