Then have a look at the ones you listed above him. He is a different style of CM. Seems more complete than many others.
He's strong in dribbling, likes to play short combinations, and maintains possession under pressure. Adds a layer of creativity and progression in midfield phases where the Socceroos sometimes lack incision or composure on the ball.
He is versatile across midfield roles. He can operate as a defensive midfielder, central midfielder, attacking midfielder, winger, or even forward. This adaptability gives Popovic tactical flexibility, especially in transitional or high-pressing setups.
He's combative, tactically mature, and competes physically through smart positioning and tenacity rather than brute strength using his body well to protect the ball.