England have Curtis Jones, Rico Lewis, Lewis Miley, Alex Scott, who have some of these chareteristics, Mainoo will eventually be an England regular but don’t think will be this summer, England are producing more midfielders of his ilk, I can’t think of a teenager has accomplished as him at this moment but there are a couple at an older age and ages below.
Eventually in next couple years I see him being a mainstay in and around the England first team, don’t think Southgate will take the risk of taking him to Euros though, will be out of him Alex Scott Rico Lewis and Gomes and Jones I feel for next midfielders to step up and I think he’d go with the players who have played u21 football first and foremost, unless Mainoo has a Fabregas Wilshere like impact from now till the end of the season.