A vigorous weightlifting workout for an hour will burn about 400kcal[1], which is roughly equivalent to walking 10k steps depending on your body weight. Another way to think of this is 100 minutes of brisk walking will round out to about 400kcal.

You don't really burn more calories walking, it's just easy to do and fit in around other things.

[1] https://www.medicalnewstoday.com/articles/323922#calculating...

Weird hill to die on - 400 is probably the top end for a super heavy day at a higher bodyweight - maybe deadlift primary and squat secondary day? Walking for 10,000 steps will every day will certainly burn more calories.

Regardless, people who lift aren’t eating more just because they burn a couple of hundred calories 2-5 times a week.