Two or my four smartphones have been Samsungs and, while I could call 112 on purpose, I don't know what might cause pocket dialing. Your comment about this being a feature rather than a bug on Pixels is funny though =)
I never used to lock my phone at all, but starting with the Pixel 3a I've been forced to do it by the fact that the phone interprets rubbing against my leg through my pocket as a stream of commands. I wish manufacturers would go back to the non-crazy screens they used to make. Anyway, since locking the phone doesn't disable the ability to call 911, this is a constant risk, though I don't believe I've made an accidental call yet. (Or maybe I would have, if my phones weren't Pixels!)
I have mangled a text note I was keeping on my phone beyond recovery when I once put my phone in my pocket without manually locking it first.
But my question was: what is the it that your phone has? I don't have such a button on my lock screen. There's a camera and a flashlight shortcut (too few shortcuts for my liking but better than bare android with zero shortcuts)