At the moment the edited date is not a searchable property in the search field, something we plan to add in a future overhaul of search. However there are two ways it kind of can be done:
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The Open Quickly command supports a few special queries, including “recent” which will show you notes recently edited (within the last 48h), see for the complete list here: Navigating Your Notes
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Through the recently edited section in the inspector on the right, you can scroll it down and shows notes sorted by last edited date first.