Unfortunately, if you asking for this kind of request to Siri directly Siri gives you full name , even you have their nickname.
Shortcuts on iOS and iPadOS able to do that. Just create a new shortcut: add Map app -> add address... Name this short cuts as "directions to someone’s address".
After saving, ask Siri "directions to someone’s ...
SAT stands for Siri Audio Transcripts.
It's a UF_DATAVAULT, a new type of privacy container in Catalina that restricts who can access the contents by specific entitlement. This means nothing can access the contents except the individual binary granted the individual entitlement.