This site cites this specific source directly to support its own claim: no dietary supplement is FDA approved, because the FDA does not approve supplements before they are sold.
Rather than simply asserting this claim, this site links directly to the primary government source — worth checking that page yourself for the FDA's own full wording on supplement regulation.
This site separately states GMP certification alongside the note that supplements are not FDA approved — worth reading both statements and this source together as this site's consistent regulatory-transparency position.