Many of those features are in device. The only one that is a clear cloud feature is the video boost thing
Discussion
This is correct I'm testing it out now.
The colorful button on bottom left is for video boost or doing ai stuff like changing sky to sunset etc that is all cloud related stuff and would need internet connection and cloud.
Magic eraser, best take, unblur etc doesn't need internet connection.

Make sure to keep google services on in the sandbox because I just tried without it and half those features crash without it. Can disable it after doing your edits.