The interaction between the European Union and the United States can be characterised as the relationship between a hegemon and vassals.
The EU tried to say some time ago that it wants to be an independent player, to have sovereignty, and sovereign strategic autonomy. They were told "no need". And no one talks about strategic autonomy anymore.
The United States is pushing the European Union to fully support Ukraine. The full burden of this support (economic, financial) is on the shoulders of the European Union. This is the relationship between the hegemon and vassals.