I removed the "Arrow Left" button by error (where group all the buttons) from Touch Bar Mac

I removed the "Arrow Left" button by error (where group all the buttons) but now I can't return back, I tried to configure on "System Preferences" -> "Keyboard" but It doesn't show me. Picture 1: This is how's needs to looks as before: Picture 2: This how's looks now (without the arrows): What can I do? Please help! (I really needs to fix this problem because I need to have it for work).