If you are looking for the background music (BGM) that plays just before the credits transition (around the 22-23 minute mark), it is part of the original score by , likely the track "the golden bowlers" .
You can find the full song on Spotify or watch the official non-credit ending on the MAPPA YouTube Channel .
In the standard TV broadcast version of Episode 5 (which typically runs around 24 minutes), the scene at 23:55 falls during the . Unlike many anime, Chainsaw Man features a unique ending theme and animation for each individual episode.
"In the Back Room" (インザバックルーム) Artist: syudou