Open System Preferences/Privacy/Full Disk Access with url
x-apple.systempreferences:com.apple.preference.security?Privacy_AllFiles


You can list all the available anchors for the pane by opening the pane and running the AppleScript

tell application "System Preferences" to get name of anchors of current pane


This returns the following list:


Advanced
FDE
Firewall
General
Privacy
Privacy_Accessibility
Privacy_AllFiles
Privacy_Assistive
Privacy_Calendars
Privacy_Camera
Privacy_Contacts
Privacy_Diagnostics
Privacy_LinkedIn
Privacy_LocationServices
Privacy_Microphone
Privacy_Reminders
Privacy_SystemServices