Some recent evidence is kinda mixed: https://scitechdaily.com/new-research-reveals-that-standing-desks-could-actually-be-harming-your-health/
It's good if otherwise you would be sitting for long periods of time, but it's probably better if you're moving around rather than standing in one place, which causes its own problems. Musculoskeletal problems, in addition to the cardio issue mentioned in the link.