Catstream (2020)

Cat rescue volunteer Mirna Kirin goes to the island of Mljet in an effort to castrate local cats. In only seven days, she traps dozens of cats. Her Don Quixotesque struggle, both with the cats and the islanders, intensifies as they often refuse to collaborate, and her attempts to explain the reasons for her actions cause her to break.

Unfortunately the movie Catstream is not yet available on HBO Max.