Manchester United waved goodbye to midfielder Isak Hansen-Aaroen on transfer deadline day as he pursued first team football. Kobbie Mainoo has enjoyed a remarkable rise since winning the FA Youth Cup in 2022. He was part of a three-man midfield who led the team to silverware. Another part of that midfield, Dan Gore, made his first team debut last September, but Isak Hansen-Aaroen was the odd man out. Hansen-Aaroen had played first team football at Tromso when he was 15 before joining United and grew impatient with a lack of opportunities. He forced through an exit in January. READ: Confirmed M…