I bought this motherboard three weeks ago and bios was already updated, my ryzen 3600 was directly working

Gemäss Hersteller https://www.msi.com/Motherboar... ist ein USB Flash Update möglich (also auch ohne CPU) "Flash BIOS Button: Simply use a USB key to flash any BIOS within seconds, without installing a CPU, memory or graphics card"

...only MSI knows that.