Not on these platforms; keystrokes and screenshots. It's a horrible thing, but on the flip side, of course many people who hire get screwed by people doing nothing but charging a lot for it.

I cannot work on upwork as I ponder problems before I solve them; I can have quite large amounts of time without keystrokes or my laptop might be asleep. I would refuse it anyway if it was required though.

Desktop logging is mostly used for hourly projects. I think it is possible (or used to be) to use logging for fixed projects as well, but there is little value here.

For what you describe, hourly billing will not work anyway. Some kind of fixed type of payment, or perhaps retainer + hourly billing for actual typing/research would be more appropriate. I think, both can be setup on Upwork (as two separate projects)