You have to poop every day

The frequency that you have bowel movements does not indicate gut health.  Poop should be soft and formed.  If that's every day, great.  If not, no biggie.

If you have concerns about constipation, it should be because the stool is hard.  Constipation is not about gas, the work involved in passing the stool, the size of the stool or the number of days in between stools. Kids turn all sorts of shades of red when they pass stool-- that doesn't mean that they are constipated.  And the color of the stool, unless it's red, white or blue doesn't help either.

And healthy exclusively breastfed infants (older than 6 weeks or so) might only poop once a week and that's very normal.

more info on normal bowel movements and constipation