Yes, she might be. JK Rowling has been quite creative over the years. Given her past success with the Harry Potter series and other works, it's very likely that she is exploring new story ideas. However, as of now, there may not be an official announcement regarding a completely new story.
Yes, they are official. JK Rowling is the creator of the Harry Potter universe, and any new stories she releases are considered official additions to the franchise.
JK Rowling has been involved in new stories that could potentially include more about the magic system in her fictional universe. Maybe new spells, magical creatures, and how they interact with the human characters in the wizarding world. For example, she might explore how different magical creatures contribute to the overall balance or chaos in that world.
Well, without having read them in detail, it could be that some of the stories might focus on the backstories of minor characters from the original series. For example, we might get to know more about the lives of some of the teachers at Hogwarts before Harry arrived. Or maybe they are set in different time periods within the wizarding world, like delving into the history of the Founders of Hogwarts. Another possibility is that they could explore new magical creatures and their relationships with wizards.
As of July 2023, there were no official announcements of a brand - new Harry Potter story directly from JK Rowling. However, she has continued to expand the Wizarding World in other ways, like with the Fantastic Beasts series which is set in the same universe.