Is there such a thing as getting a replacement screw for the video doorbell pro, which I have stripped?
Welcome to the Forum, @tygee7! 
Although I’ve seen Wyze make some mounting kit hardware available as accessories in the shop, I don’t recall seeing that specific part. The Help Center lists sizes for the mounting screws, but if you’re asking about the security screw then I don’t know what the details are for that one. I’d probably be inclined to just take the problem screw to a local hardware store and look for something similar.