Older en iPads; 9.7”, 10.5”, 12.9” had the exact same bending propensity, I have older iPad Pros that are bent to prove that this is normal for 6-7mm thick devices that are 8x11" or 6x8 long or wide, plus... science.
lol.
Any metal device will bend under enough stress. However, the new models’ metal is thinner and the structural design inferior to prior models. I know it’s cringe-worthy, but here is someone dropping a 10.5 next to an 11 for direct comparison:
I returned an 11” because it felt very flimsy compared to prior iPads and bought a 10.5”. I have owned 10 other iPad models and all were solid, well made products.