Well after making this comment i have actually looked into it, ofc Europe is leading on this thing

from google AI overview

Several European countries are implementing legislation to encourage or mandate the installation of solar panels on parking lots, especially larger ones. This is part of the EU’s push for renewable energy and energy efficiency, making use of parking areas as potential sites for solar generation.

EU Level:

• The EU’s Energy Performance of Buildings Directive (EPBD) aims to make zero-emission buildings the standard and requires new buildings to be “solar-ready.”
• The EPBD promotes solar energy use in buildings and encourages installing solar panels on certain existing non-residential buildings, including parking lots.
• The EU has set deployment targets for photovoltaics, recognizing parking lots as a key area for development.
• The EU is also working on a “Solar Standard” to further drive solar adoption in buildings and parking lots.

National Legislation:

• France: Requires solar panels on existing and new car parks over 1,500 m², with deadlines for compliance.
• Slovenia: Introduced requirements for solar panel installation on new parking lots.
• Greece: Stipulates 60% coverage of large open car parks with solar panels.
• Germany: Many federal states have made solar panels on car parks a legal obligation.
• Netherlands: Has large-scale solar carport installations, including one of the world’s largest in Biddinghuizen.
• Austria: Introducing similar legislation to encourage solarization of parking lots.
• Spain: Legislation is also encouraging solar panel installations on parking lots.