I have an Asrock DESKMINI A300 with a Ryzen 5 3400g. I noticed that there is the newer Asrock DESKMINI X300 that supports Ryzen 4000 APUs and even looks better IMO. I
ASRock > DeskMini A300 Series
ASRock Launches World's First Mini-STX Platform Based on AMD A300: DeskMini A300 | TechPowerUp
ASRock DeskMini X300 Barebone AMD AM4 Mini PC - DESKMINI-X300 | Mwave