If you do, then what exactly defines a soul in your view?
Well, quite literally everything is physics, so if a soul exists, it has to be supported by physics.
True, but physics does not explain everything yet. Ask an astrophysicist, and neurophysicist, or a quantum physicist, and they’ll probably have a long laundry list of things we don’t understand yet.
And so, accepting the possibility does not mean rejecting physics. It only means we haven’t gotten there yet, and maybe there are things about the human experience that physics hasn’t yet even begun to grapple with.