FIFA is hoping to be granted permission from the International Football Association Board (IFAB) to continue trials of Football Video Support (FVS), an alternative VAR system which gives coaches the chance to challenge decisions.
Rather than reviews being overseen and controlled only by an official acting as a video assistant referee, FVS gives coaches the chance to make up to two challenges per match if they feel an error has been made.
https://www.espn.com/soccer/story/_/id/42347583/fifa-hopes-expand-trials-var-style-coach-challenges