The "Ask Gemini" thing existed before this, between that and the lack of an AI settings page it seems it's not considering the system as one of the initial supported ones (but why specifically I'm not sure).
I can confirm a paid Gemini account is not [corrected] needed.
No problem, it took me a minute to get it enabled myself - not sure why it's so special cased for what it is.
My apologize, I swear I tried to type "is not needed" but must have completely brain farted.
To reclarify: A paid account is NOT needed. I do not have one and it works. Do note the page says a US based Google account is needed though, it just doesn't need to be a paid gemini account.