Humans are usually much easier to tell whether they’re male or female at a quick look than say a dog or a horse, which you’d pretty much have to look at their genitalia to tell. So yes, humans have high sexual dimorphism.

Men tend towards larger upper body size, heavier musculature, larger overall skeleton, higher quantities and more locations for body hair, etc.

Women tend towards lighter frames, larger hips, gozongas, less body hair in fewer places, etc.

Men and women even store fat differently after puberty with women storing it more subcutaneously (better insulation for the baby cooker) and men storing it more around their vital organs (bad for your long term health but good for protecting your organs in combat).

Fun fact though... higher estrogen in women and higher testosterone in men has a similar effect on the vocal cords, making the voice deeper. Men get that deep bass like Vin Diesel and women get that sultry husky voice like Scarlett Johansson.

Correct, we even lost a lot of our sexual dimorphism compared to our ancestors we share with apes.

As humans we're obviously biased to see every minute difference among our own species now, so people may assume otherwise.

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Have you seen the size difference between HEALTHY males and females?