[dblackfl]

That first cargo mat you got with the cutout on the right is for the PHEV. I happened to be looking under the hatch at a '23 PHEV last weekend and noted that exact shape.
There's a similar cutout for the gen 1 PHEVs, just a more curved shape. It's where the12V "auxiliary" battery is located.

BTW very happy with my Weathertech cargo mat. Fit perfectly and I like the lip around it to help contain any spills. Thinner than I expected yet sufficient.
If I had a '23 I'd be after them to get one done for it too (assuming they haven't already).

 

[dblackfl]

That curved shape on the right houses that battery, but goes straight back from there.

Indeed it does. The mat has a tie-down cutout in each of the four corners, including the one nearest the battery. On the near right, imagine if that cut-out wasn't there. It'd exactly fit the contour in your photo, and does match the full width past the cutout and back. At first glance the mat looks a little strange because of those cutouts for each of the tie-down points, combined with the asymmetry of everything in the near right corner scooted several inches to the left.

FWIW my '21 has the same shape, just without as much of a subjective bulge from the battery enclosure. Different overall dimensions too of course - I'm pretty sure smaller.