This behavior you mention has been requested a few times.
Here’s one of them: https://github.com/notepad-plus-plus/notepad-plus-plus/issues/1499
There are some potential problems with the request:

• How do you know if a line contains 1 hit, 2 hits, 3 hits, etc.?
• How do you jump into the “source” for the search if you want the 2nd, 3rd, etc. hit? (One assumes that a double-click on the line would jump to the first match – current behavior)
  Maybe these are “don’t cares” for you, but, as pointed out to you in another thread, you aren’t the only Notepad++ user in the universe.

This complaint is technically different, but based on the same assumptions, as the other complaint you just made.

However, despite those differences, my reply here would be identical to my reply in that other discussion.