Looks to me like the dash material "sunk" from its previous level. Probably due to some heavy stuff being placed on the dash.
The pic shows a light shadow on the leather where the dash used to be. Actually, if you look at the points where the leather trim meets the dash at the points closest to the steering wheel, you'll see the original level of the dash. That level should be the same throughout the entire assembly - at least it is on my 2017 REx. That's why I think instead of the leather shrinking, it's the dash that sunk.
Another possibility is that maybe you've had some work done that required removing the dash and it wasn't re-seated properly.