Happy Home Paradise requires the game to be updated to at least version 2.0.0 to function. If you install the DLC without the patch, the airport will not offer the "work" option.
This guide breaks down exactly what those three DLCs are, how they function within the NSP ecosystem, and why the “All DLC” package is the holy grail for New Horizons preservation. Animal Crossing New Horizons -NSP--3 DLCs All...
But practically, yes.
“Pirated Content Detected. Would you like to purchase the ‘Authentic Reality’ DLC for $99.99? (Y/N)” Happy Home Paradise requires the game to be