[6] 25 minutes after the single released on July 29, AJR performed the song on The Tonight Show Starring Jimmy Fallon.

[7] The band also signed with Mercury Records on May 18, 2022,[8] making "I Won't" the first song AJR has released through the label.

[9] "I Won't" is composed in 44 time signature in the key of C major and follows a tempo of 162 beats per minute (bpm).

The song's instruments consist of an "old-fashioned" and "mysterious" piano, a violin and organ with digital pitch-bending, a bassline with "percussive elements", and a kick and snare interplay.

The video was initially intended to be released at 10 AM EST, but was delayed to later in the day, with the band stating "we were up all night finishing the edit and it's taking forever to export and upload".