Lowering texture model's details doesn't affect the game

Hai,
This seems to be a issue where the settings in your nvidia control panel are overiding the in game options.

To resolve this you open Nvidia control panel and navigate to the 3D settings for individual programs.

Now locate or add the Apex legends game, then find your anisotropic filtering setting and set it to application controlled.

You can browse through these settings to further improve your framerate if needed.

Once done apply settings and try out the game.