Before answering that, here’s a thing to note—success in the Under 19 Indian cricket team hardly means a successful career on the biggest stage. We have seen many such cases. That being said, one player that can leave a big mark in the main team is Shubam Gill. He was the top scorer in the world cup, scoring matches-winning 372 runs that won him player of the series award. He performed incredibly well, took the pressure very well, and delivered when the team needed him the most.
Aside from Gill, there were few players who impressed the viewers (and possibly the selectors). Prithvi Shaw—one of the most talented players on the team, Ishan Porel—a great right-arm medium bowler who was handpicked by great Rahul Dravid himself, and Himanshu Rana—a tail-end batsman who can take pressure good and get the winning runs for the team.
These are the players who can make big in the main India cricket team. Of course, they would need to learn a lot more. Hopefully, playing Ranji and other domestic tournaments will polish them brighter and they can become the next big things in the cricketing world.