Yes, Stranger and Lovers is definitely a goth band because most of their albums belong to the Gothic Rock and Darkwave genres, which are among the core subgenres of goth music. Albums like Masochistic Love, Pervert, and Stranger and Lovers are examples of their goth sound.
Stranger and Lovers is located in Mexico, Mexico City, active in 2018 — present. You can find more information about Stranger and Lovers on their GothDB band page.
Want to check if another band is goth? Search other bands.