That’s news to me considering the EPA-rated fuel economy of vehicles with both hybrid and pure ICE drivetrains is universally higher for the hybrid versions.
Because they make certain assumptions. Fortunately the EU mandated that cars measures those things since various years. That caused a review of those hybrids. They’re usually not charged.
In Netherlands there’s a crazy markup on that. You need a local installer. Local installers get huge kickbacks from Dutch sellers. As a result pretty much all installers refuse to install anything bought yourself. Meaning, it costs thousands per AC instead of what it should be.