They have the pocket, but the small opening at the bottom is too small for a big kneepad, and I've started using the radbacks ones (which are great btw), but it'd be a faff getting them in and out. On other pairs I've undone some stitching to make the hole bigger, but it's still not as good as a proper pocket. I'm assuming you're talking about ones that look like this:
Yep those are the ones. My dickies overalls just get washed with the pads in. If I got pads for the carharrts I’d get them in and never get them out again until the garment had worn out.
They have the pocket, but the small opening at the bottom is too small for a big kneepad, and I've started using the radbacks ones (which are great btw), but it'd be a faff getting them in and out. On other pairs I've undone some stitching to make the hole bigger, but it's still not as good as a proper pocket. I'm assuming you're talking about ones that look like this: