No. The "unknown sources" method works without rooting.
Once downloaded:
How to install "Nap After the Game" APK on Android download nap after the game android apk install
If you are the developer of this app, I recommend publishing it on Google Play or a trusted platform like APKMirror, then sharing that link. If you saw this app mentioned somewhere else (Reddit, Telegram, etc.), be extra cautious. If you are the developer of this app,