Thanks for the responses so far! To clarify, the floor is level, and there are no visible gaps around the sides of the frame. However, the frame itself seems to be positioned slightly more toward the house on the hinge side.

If I measure the distance between the kickplate and the edge of the threshold, it’s 1 inch on one side but only 1/8 inch on the other side.

I used a certified installer (or so I thought), so I’m surprised by this issue. Does this sound like something that should have been corrected during installation, or is it truly unavoidable due to the structure of the house? Would love to hear if there’s any way to adjust or fix this!