Why there is no FPS setting in the game? :/

I'd like to see this in game too, but in the meantime you can add a command line in Origin to cap the framerate.

To do this Open Origin> Right click on Apex Legends > Go to Game Properties > Advanced Launcher Options > Command line arguments > then enter   +fps_max XX  with XX being the frames you want to cap at.

I do this at the moment to keep a remarkably average 60fps!! 😉

Then type 140 in  the code above rather than 60