Alle mit diesem Mainboard kompatiblen CPUs findest du in folgender Liste https://www.asus.com/Motherboards-Components/Motherboards/TUF-Gaming/TUF-GAMING-B550M-PLUS/HelpDesk_CPU/

If you scroll down a bit further next time (after the specifications, at warranty approx.) you will see the exact details. Normally, this means that when you buy the product, you have to register it with the manufacturer (link provided). The manufacturer will then refund you the promised amount.

The packaging of the mainboard says "AMD RYZEN 5000X DESKTOP READY". However, I have ordered a mainboard whose features look more promising (https://www.digitec.ch/de/s1/product/asus-tuf-gaming-b550m-plus-wi-fi-am4-amd-b550-matx-mainboard-13348828).