I felt that I needed to make this before someone takes the turn.
UPDATE Nov 27, 2021: reworked model (weights)
Extract and put the C_FEM_LARACROFTPSX_BASE_P.pak and one of the _CST_ .pak files in your Tekken 7 ~mods folder. Each _CST file enables the mod to one full body costume. Use only one of them to avoid this mod conflicting with another mods you have installed. There are variations for DLC costumes (Alison Costume or Hikari Costume) and regular ones for who don't have DLC costumes (Santa Dress or Halterneck Dress)
Full Head: Buddha Mask Full Body: Alison/Hikari/Santa/Halterneck (Harada Suit/Vintage Bathing Suit for Leo)
Lara Croft/Tomb Raider (C) Square Enix/Eidos Montreal