This episode was originally intended to be the series finale, but Nickelodeon instead decided to air it mid-season and release The Big Blow Out (2017) as the series finale. Although when the season was added to Paramount+, it was released as the series finale.
On the official Teenage Mutant Ninja Turtles twitter and an official press release, Nickelodeon has described this episode as not being canon to the main story-line and taking place in "another dimension."