I would also need this.

We in the Community are fellow users. Telling us you want the feature won’t tell the developer that you want the feature.

last year, @Alan-Kilborn linked to the still-open feature request here: https://github.com/notepad-plus-plus/notepad-plus-plus/issues/11118

if you want the developer to know that there are more people who want this feature, you need to add a comment in that open feature request.

• https://github.com/notepad-plus-plus/notepad-plus-plus/issues/11118
• https://community.notepad-plus-plus.org/topic/22281/ctrl-f-count

it’s not exactly what you want, but Search > Incremental Search is the feature meant to mimic the browser-style previous/next/count dialog:

It gives the text and the number of matches, but doesn’t tell you how far through. However, the Status Bar just below the Incremental Search bar will give you an indication of where you are in the document.

Other than that, we have a FAQ on how to request new features – you could request that the current match-number be added next to the number of matches in the Incremental Search bar.