Sure seems like Fenix Flexin used AI music generator Treblo

Fenix Flexin's song "Rubberz" is believed to have been created using the AI music generator Treblo. Musician Medasin asserted that Treblo was specifically used, and a new detection tool from the company supports this claim. The open-source Treblo AI Music Classifier, announced on Monday, can identify songs generated by Treblo with a false positive rate of less than 1 in 10,000. The Classifier determined that "Rubberz" was "very likely Treblo" with "high confidence."