The first movie is
X (set in 1979), then the prequel
Pearl (set in 1918) and now the next one
MaXXXine (apparently set in 80s), which is a sequel to
X.
Overall a Slasher film series with
Pearl being the most unique of all so far, with a classical Hollywood cinema-like worldbuilding.
The original film,
X, is pretty good too, with Mia Goth performing both; Maxine & Pearl (an elderly woman here).
