By now (jan. 2022) my board was delivered with „works with Ryzen 5000“ printed on the package. And it just works with my 5600x out of the box. Bios version is 1.5.

No, its not. I also had some issues upgrading it, but got it to work after like 2 hours of trying different stuff with the second latest bios firmware. others are still struggling with it, so its a bit a risk. if you have an older ryzen to flash the bios with that it won't be an issue though as I had to do it with the usb stick as I didn't have a working cpu to start the bios.