fdesetup usage deprecated (seeking more information)

This page indicates https://support.apple.com/en-in/guide/deployment/dep0a2cb7686/web that some usage of fdesetup command line tool is deprecated such as turning on FV using username/password. However, I don't see any proper information about which options from the fdesetup tool are deprecated and which are still valid? Any pointers for that?

Thanks, N

fdesetup usage deprecated (seeking more information)
 
 
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