In my area, OpenDoor was buying sight unseen. All they required was a 10 minute zoom call where you walk them through the house. Zillow actually sent out someone to do a home inspection (although a bit more cursory than what a typical buyer would pay for). This may have varied by market though.
This happens in hot real estate markets. If you don’t want to miss out or start a bidding war, you have to be the most frictionless buyer.