The movie "My Hero Academia: You're Next" takes place early in Season 7 of the My Hero Academia anime, specifically right after Season 7, Episode 4. This episode is just after Aoyama is revealed as the U.A. traitor, and that's why Aoyama does not appear in the movie along with the rest of Class 1-A. The students are shown split into three teams performing jailbreaker hunting duties, which aligns with the timeline in the anime. The events in the movie occur shortly after the "Star and Stripe" arc and before the final confrontation with the villains, taking place over just a day or two within that week of time.
The film premiered in theaters in Japan on August 2, 2024, and was released in the United States on October 11, 2024.
So in summary, "My Hero Academia: You're Next" is set just after Season 7, Episode 4 of the anime series, during the ongoing season's storyline.