@Larymir didn't she sell al rights?
@Bobo_PK according to this article she still owns all the rights:
"[…] she continues to hold primary intellectual property rights to the entire Harry Potter franchise."
https://www.theverge.com/report/901818/hbo-harry-potter-jk-rowling-transphobia
There is no ethical consumption of HBO’s Harry Potter series

JK Rowling’s transphobia casts and inescapable shadow over the new Harry Potter adaptation.

The Verge