* Harry Potter 7 is already finished. The series concluded with the release of "Harry Potter and the Deathly Hallows - Part 2" in 2011. There are no plans for any further movies in the main series.
* The story is told from Harry's perspective. The films focus on Harry's journey, and the narrative doesn't delve deeply into Lily's childhood. While we get glimpses of her life through flashbacks and conversations, it's not a central focus.
* Flashbacks are often handled with existing footage. The films often utilize existing footage or CGI to depict younger versions of characters. For example, younger versions of Ron and Hermione were created using CGI in earlier films.
While it's possible that a prequel film or series could focus on Lily's childhood, there are no confirmed plans for anything like that.
It's important to remember that fictional stories and their adaptations are controlled by their creators. The filmmakers would have to decide if they wanted to tell a story focused on young Lily Evans, and that decision would involve a variety of factors, including audience interest and budget.