According to Psychology Today, children gain maturity as they are forced to face problems on their own and then solve said problems. This has led to a huge issue within the current generation, as more than ever before children now spend most of their childhood looking at a screen—thus they are rarely faced with real world problems that need solving. 

So, children who are now graduating high school are actually more immature as a whole, than kids who graduated high school ten years before. And this problem is only going to increase as COVID-19 progressively leads kids to stay at home and avoid the social settings which are vital for their emotional development.