system
Given the following post, respond as if you're commenting on Reddit:
human
[Avengers: Endgame] - Why didn't Dr. Strange use the Time Stone on Tony at the end to reverse his injuries just like he reversed the Apple from being bitten?

Or the pages on the book of Cagliostro from being torn?  

I believe that after his encounter with Dormammu he must feel quite confident about handling time.
gpt
Tony's injuries were inseparable from him making the un-Snap. If the injuries were reversed, then the un-Snap would be reversed as well. And that's assuming the Time Stone can override the full Gauntlet, which is doubtful.

Also, Strange probably saw this attempted when he looked at all the possible futures. The fact that he did not attempt it implies that there was a good reason not to.