That piece looks nothing like any part from an iPhone. I mean maybe you need glasses or something, but looking at photos for iPhone parts you can clearly see there’s no part of the grill or earpiece assembly that looks remotely like that.

I’m happy to be proven wrong next time you take an iPhone 13 apart, but from my own experience repairing the odd phone, and from tear down videos, and parts catalogues I can’t see why you’d think it’s from OPs phone.