There is no WPS button on the Wyze Mesh Router. I realize you can’t add a physical button but there should be a virtual button in the app.
Please use the Wishlist to suggest new features like this! That’s a good idea, definitely would be convenient
Here is an interesting read on WPS.
As @IEatBeans indicated, you can add it to the Wishlist area. Matter of fact, you can add your item to this wish:
Welcome to the Wyze User Community Forum @JackD!
Not many new routers come with that today since it has been found to be minimally secure and only older legacy equipment still uses it.