Used Mini-itx For Asus Rog Strix X570-i Gaming Motherboard Socket Am4 For Amd X570 Original Desktop Pci-e 4.0 M.2 Mainboard - Motherboards - AliExpress
B550 AM4 mini itx Motherboard B550SD4 ITX for AMD Ryzen 3000/5000 series processors DDR4 Dual Channel| | - AliExpress
ASUS ROG Strix X570-I Gaming - motherboard - mini ITX - Socket AM4 - AMD X570
Taking a look at Thin Mini-ITX AM4 motherboards
Asus Prime A320I-K AMD Ryzen AM4 DDR4 M.2 DP HDMI Mini ITX (Mitx) A320 Motherboard with Gigabit LAN, USB 3.1 Gen1
ASRock > X300TM-ITX
The Best Mini-ITX Motherboards (AMD & Intel)
Taking a look at Thin Mini-ITX AM4 motherboards
MSI Performance Gaming AMD Ryzen 1st and 2nd Gen AM4 M.2 USB 3 DDR4 HDMI Display Port Mini-ITX Motherboard (B450I GAMING Plus AC)
GIGABYTE B450 I AORUS PRO WIFI AM4 Mini ITX AMD Motherboard - Newegg.com
MSI Performance Gaming B450I Plus AC Mini ITX Motherboard - Newegg.com
ASRock AMD AM4 A320M-ITX Motherboard | TeqFind
ASRock B550M-ITX/AC AM4 Mini ITX AMD Motherboard - Newegg.com