> What I noticed is that they are usually funded by public grants rather than VCs. I am not sure why this is the case.
American VC culture derives from America's privileged position in the global financial system. It can't be replicated by a country that doesn't have a ton of money floating around looking for investments.
Second reason: nobody likes what American VC culture created, so they don't want it to be replicated. Government grant funding can make decisions on axes other than profitability.