Other than in the Debriefing Pack, how do we view notes that we've logged? Reason being, on a busy flight, I might need to go back and check what I've logged.
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‌Is it possible to edit or delete a logged note? In case of typos or errors?

You can only write a note in a log when you are actually logging. So if you're half way into a flight, you will be logging, and you can log any notes you want.

The notes associated with a flight are part of the record of what happened during the flight, and they're not designed such that you can go back and edit them.‌‌ The debriefing pack is exactly where you go to view lots of things associated with the log including notes; I'm not sure why we would duplicate them elsewhere.