Restrict compute to Europe region

I would like to know if it is possible to restrict the processing of our calls to the Gemini API to the Europe region?

This is because we will be passing user information in the system prompt and we have an agreement with our customers that their data will only be processed within the EU.

I can see that some other Google APIs allow for this but I cannot see how it can be specified with Gemini.

Answering myself after more reading. It would appear that to do what I need I would have to use the Vertex AI Gemini API instead.