How to check XProtect and MRT versions running Big Sur?

Gatekeeper
/usr/libexec/PlistBuddy -c "Print CFBundleShortVersionString" /private/var/db/gkopaque.bundle/Contents/Info.plist

XProtect
defaults read /Library/Apple/System/Library/CoreServices/XProtect.bundle/Contents/Info.plist CFBundleShortVersionString

Check XProtect Version on MacOS Catalina (10.15.x) & MacOS Mojave (10.14.x) and later:
system_profiler SPInstallHistoryDataType | grep -A 5 "XProtectPlistConfigData"

MRT (Malware Removal Tool)
defaults read /Library/Apple/System/Library/CoreServices/MRT.app/Contents/Info.plist CFBundleShortVersionString

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