Looking into distribution channel of Wayfair, wondering how deliveries are made and where they are made from, much of the information on their site requires a membership sign up now, but did manage to find job listings for warehouses to get an idea of where these items ship from and what companies deliver for them. POTUS a few months ago did an appreciation event for truckers during the early days of COVID 19, when he handed keys to several different shipping companies, FEDX, DHS, etc.
Wayfair does not have a delivery system they subcontract deliveries to other companies.
Here are the posted Wayfair warehouse job openings and their delivery policies. Which is quite interesting considering the Keys.