Kokoro Connect needs to be printed
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As we know that all the volumes of kokoro connect has been completed, I urge j-novel club to start releasing its physical copies as the anime was successful in attracting viewers and most of them will want to know what happens next and hence will want to buy the light novels but because it is not printed they prefer to wait and not buy it's digital edition, just like classroom of the elite people will want to know the rest of the story after Season 1 but only when it is available in paperback format.
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This has been suggested before. See https://forums.j-novel.club/topic/5349/what-are-the-chances-for-kokoro-connect-to-get-a-physcial-release for the relevant discussion.
While I enjoyed the anime it appears that there weren't enough ebook sales to justify a physical release. More people calling for it on the forum might help but I have no idea how well it sold as an e-book so it'd be difficult to speculate.
If you want an official take on it you would probably need to ask as part of a Q&A at a convention or announcement stream as JNC don't usually comment on specific commercial see decisions on the forums. You could also try getting the attention of Sam aka Quarkboy on Discord or Twitter or Reddit.