Yes, Natures Mortes is definitely a goth band because most of their albums belong to the Deathrock genre, which is a core subgenre of goth music. Albums like Blind Submission, Bruises, and Inside Out are examples of their goth sound.
Natures Mortes is located in Poland, Warsaw / Poznań, active in 2023 — present. You can find more information about Natures Mortes on their GothDB band page.