List of available metrics that SalesForce provides through an API available here.
We highly recommend to contact integration platforms to figure out what metrics they can extract. Sometimes integration platforms don't have certain metrics out of the box, so it's better to contact them.
More integrations to Google Data Studio
Google DataStudio is a powerful tool for making data visual. But you should not have to upload your data by yourself. Connect other sources of data to automate the process.
Don’t limit yourself with just one or two automation scenarios. Salesforce is a swissknife that allows you to customize your business processes as you wish. With no-code integration software, you can connect it to pretty much any tool you are using.