Not to argue with you—but walking has been a part of my regimen for a decade now (twice a day—after breakfast and dinner, FWIW) and there has been no obvious weight loss (I record it twice a week in Apple's Health app—have been for 8 years now).

Now, who knows, without the walking I might have been 10 pounds heavier, but it sure didn't bring my weight down.

The only thing that did (in my eight years of recording) was eating less.

I had to prepare for surgery some 7 or so years ago and started eating the smallest of meals out of fear that I might die before the operation could take place (I had a constriction in my intestinal tract that, if blocked, could cause my intestines to burst).

In that two months of fear and small portions I lost like 20 pounds.

In the 7 years since though, I have been unable to stay at the small portions. (Until Zepbound.)