On your .webflow.io address, add ?smootify-debug to the page's address; on a computer, press Alt+Shift+D.
The symptom. Something does not show on mobile, and you have no keyboard shortcut there.
Why. Smootify’s debugger runs on your .webflow.io address only, and stays off until you ask for it.
The fix. On a phone, add ?smootify-debug to the address, such as https://example.webflow.io/products/linen-shirt?smootify-debug. On a computer, press Alt⇧ ShiftD (⌥ Option⇧ ShiftD on a Mac). Its Checks tab lists what Smootify cannot use on that page, and why.