Asus confirms AMD Ryzen 5000 support on X470, B450, B450 II - Mainboard - News - HEXUS.net
ASUS X570 B550 B450 | Best AM4 Motherboard for AMD Zen 3 Ryzen 5000 CPU
Amazon.com: ASUS Prime B450M-A II AMD AM4 (Ryzen 5000, 3rd/2nd/1st Gen Ryzen Micro ATX Motherboard (128GB DDR4, 4400 O.C.), NVMe, HDMI 2.0b/DVI/D-Sub, USB 3.2 Gen 2, BIOS Flashback, and Aura Sync) :
ASUS X570 B550 B450 | Best AM4 Motherboard for AMD Zen 3 Ryzen 5000 CPU
Release AMD Ryzen™ 5000 Series Processors' Potential with GIGABYTE's Latest BIOS for the AMD 500 Series Motherboards | News - GIGABYTE Finland
Amazon.com: ASUS ROG Strix B550-F Gaming (WiFi 6) AMD AM4 Zen 3 Ryzen 5000 & 3rd Gen Ryzen ATX Gaming Motherboard (PCIe 4.0, BIOS Flashback, HDMI 2.1, Addressable Gen 2 RGB Header
ASUS Drops AMD Ryzen 5000 CPU Support On X470 Motherboards, Suggests Upgrade To X570 & B550 Series