Online retailers, wineries, breweries, and distilleries must comply with state laws, which require customers to be at least 21 years old.
Note: The only exception is for non-alcoholic beverages that are under 0.5% ABV, which in some states can be bought under 21, though many retailers still restrict these for anyone under 21, explains this Better Rhodes blog . If you're interested in the specifics, I can: buy alcohol online without being 21
Services like DoorDash, which allow for food delivery, prohibit the delivery of alcohol to anyone under 21. I can: Services like DoorDash