The song received mostly positive reviews from critics.
AbsolutePunk regards "Daydreaming" as a song that "channels
the Smashing Pumpkins at their prettiest in a cool way." According to
Billboard, the song is "...not as whimsical as its subject matter, but solid nonetheless."
MTV Buzzworthy describes the song as a throwback to 1990's dream pop, saying "When the chorus hits, it's a thunderclap." Popdust rates the song a 4/5, saying "The song’s sugar-rush bridge, which is capped by a grandiose rush of riffs and guitars, seems not only designed for maximum lighter (or phone)-hoisting, it’s plush enough for Williams’ song-ending assertion that she’s all right to sound like it’s being issued from a safe place fashioned by the crashing music that preceded it." At
Renowned for Sound, Jana Angeles regarded it as a "solid track", saying "...it's fantastic to see how the band have emerged from being a pop punk band into a band that isn't afraid to challenge themselves by experimenting in other musical genres." ==Music video==