[1] "Wandered to LA" is a "glossy pop" song that is set in the key of C major with a tempo of 135 beats per minute.

[4] On December 2, 2021, what would have been Juice's 23rd birthday, his team announced the single's imminent release along with Bieber being added as the co-lead artist.

A trailer video was also released on the same day, which details Juice and Bieber separately talking about their respective previous drug addictions and advising their fans to speak out about loneliness.

[5] Writing for Variety, A.D. Amorosi praised Bieber's verse on "Wandered to LA" and said that it was one of his favorites on Fighting Demons, stating "the gently jiving and soulful track is there to support Juice's jazziest-ever vocal line, with Bieber offering up a similarly slippery sing-song-iness," adding that "as a guest shot, Bieber and Juice sound as if they're playing off one another – the very point of what a dynamic feature should sound like, whether or not its host is living or deceased.

"[6] Kyann-Sian Williams of NME opined that over the "breezy guitar strums" of the song, the two artists "detail their relationships", acknowledged Juice rapping about "dark themes" in his verse ("Maybe it's because the lies, they fill her up / You see the ghost on her front porch"), but did not agree with Bieber's contribution to the song as the "lines and melodies" in his verse, "although sweet, don't fit in so well with such gothic tone of the song" (“Reminiscing about the days you broke my heart / Thankful that we worked it out – we come so far").