Most of it happens “in the cloud.” From an article I just saw posted on Lemmy:
The Gemini LLM comes in three model sizes: Nano, Pro, and Ultra. Only the Nano model is small enough to run locally on high-end Android devices like the Pixel 8 Pro and the Galaxy S24 series, whereas the other two models run on Google’s cloud servers.
https://www.androidauthority.com/gemini-nano-ai-article-summaries-3425331/
Sadly, no “cover mode” option for folders.