Greetings, that motherboard supports the 5600X on every version of its BIOS since 1004 released about a year ago, so you should not need to update it. You can find that information on the manufacturer's website and is typically labelled on the box if it is ready for a specific generation of processor: https://www.asus.com/Motherboards-Components/Motherboards/All-series/TUF-GAMING-B550-PLUS/HelpDesk_CPU/
As a further note, I have deleted your duplicate thread with the same information.
You're welcome, please let us know if you have any other questions.
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