Google One AI Premium does not include free API access?

Hi, I got myself the Google One AI Premium subscription. After that I went into the AI studio and created myself an API key, since the ways I use it are mostly from the Linux terminal and my code editor.

And now with the end of December I got charged for using the Gemini API. It's not much, but is it seriously the case that for 22 bucks a month I get nothing more than a fancy chat bot, and I additionally have to pay for the API access?