Is Super Dragon Ball Heroes canon?

Super Dragon Ball Heroes is not canon. It is set in an alternate timeline. Despite featuring Son Goku, Vegeta, and the other Z Fighters, it does not tie into the main story in any way.

ComicBook NOW! on X: New DRAGON BALL HEROES Episode Doubles-Down on JANEMBA's CANON Status! / X

Super Dragon Ball Heroes: Ultra God Mission!!!!, Dragon Ball Wiki

Super Dragon Ball Heroes World Mission launches on PC, Switch in April - Polygon

Hackotaro on X: Toyotaro worked on the storyline alongside Yoshitaka Nagayama. (For those who don't know, he is the mangaka of Super Dragon Ball Heroes). Toriyama is working on another project and

Super Dragon Ball Heroes World Mission review: Mediocre power level

The TRUTH About Dragon Ball Heroes

Is Dragon Ball Super: Super Hero canon?

Is Dragon Ball Heroes a sequel to Super? - Quora

Akira Toriyama confirms Dragon Ball Super: Super Hero's chronology with respect to the manga - Meristation