Appears so:
Team make-up
Teams competing in the Premier League International Cup will be made up of Under-23 players, aside from a maximum of three outfield players and the goalkeeper.
https://www.premierleague.com/premier-league-international-cup-explained
Group D: Brighton & Hove Albion, Everton, Bayern Munich, Benfica
The Premier League International Cup gives young players from Category One academies the chance to test themselves against some of the best equivalent Under-23 sides from across Europe.
In its fifth season, the International Cup...