Erivo, who portrays Elphaba, was not nominated for an Actor Award this year, despite having been nominated for the first Wicked film last year.
Chu was also overlooked by the Directors Guild of America Awards.
Grande, who received an Actor Award nomination for her supporting role as Glinda, praised Erivo and Chu, stating their impact is undeniable, and their work deserves recognition.
The actor and pop star insisted that her snubbed collaborators deserved “all the flowers this world can grow,” highlighting their significant contributions to the film.