By Joshua Browne Kobbie Mainoo says he’s ready to seize his opportunity to shine for England on the big stage, with a start likely against Slovakia in the last 16 of Euro 2024. The 19-year-old turned heads with an impressive 45-minute showing against Slovenia, having been tasked with replacing Conor Gallagher in the heart of England’s midfield. Mainoo’s advancing into forward areas helped England fashion chances to win the game, most notably when Cole Palmer had the chance to break the deadlock in stoppage time after a sweeping counter involving the Manchester United teenager and Anthony Gordo…