Just because the chipset supported it doesn't mean the motherboard did, and there's little incentive for a motherboard company that makes server boards (OEM or under their own brand, or both) to sell ECC motherboards for the desktop consumer market, and integrators will not want to harm their "workstation" sales if "SOHO" systems are capable of ECC.

BTW, AMD's Ryzen CPUs and "Pro" APUs (APU = cpu with integrated graphics) will all do ECC, but not "officially", and not all motherboards have BIOS that supports it. You need to google around or just try it.