Yes, Attic Frost is definitely a goth artist because most of their albums belong to the Gothic Rock and Darkwave genres, which are among the core subgenres of goth music. Albums like A New Kind Of Hopelessnees, A Heart Is The Deepest Dungeon, and A Sad Thought Made Dance are examples of their goth sound.
One of the other goth artists that is similar to them is Vendemmian.
Attic Frost is located in Germany, Bremen, active in 2022 — present. You can find more information about Attic Frost on their GothDB band page.