Following an excellent debut season with the club, winning three trophies with the Under-18s in 2024, Amass has waited patiently and worked hard to earn himself first-team opportunities under Ruben Amorim.
He made his debut as a substitute in victory at Leicester City on 16 March, and has since started four further Premier League games.
Amass has also helped United reach the UEFA Europa League final, contributing to both the breathless 5-4 extra-time victory over Olympique Lyonnais in the quarter-final and the semi-final success over Athletic Club.
In addition, Harry has represented England U18s on seven occasions this season, captaining the young Lions against Portugal in victory in March.