Can sitting on iPhone 13 damage it?

This is pretty situational - depending on your size and the firmness of the surface on which you were sitting. In general, a momentary sit won't produce any damage, and the smaller devices are generally more resistant to bending under distributed weight. If you have any kind of rigid case on the device, this would also assist with weight distribution on the device.

In this case, if you don't see any kind of physical deformity to the display or to the body of the device (i.e. bending or cracks) you should be fine.

Hi AtlanticOTX,

The iPhone 13 comes with aerospace-grade aluminium and probably won't break by sitting on it once. The couch also probably took most of the impact while you sat down on your iPhone 13. Having an iPhone 12 myself, those things can really take a beating and still be safe. Overall, your iPhone 13 is likely fine, and would not have broken just from sitting down on it.

All the best,

~Mo