I'd hope that he's playing in a midfield 3 but suspect you are right he will play him as a 10.That’s a difficult position for Harrison to start his first PL match. It’s been a while since he played as far forward as that , our u21s and a few England games . I would say creating chances and scoring isn’t one of his best features, but he’s got so much in his locker he can make an impact there .
Moyes is losing the plot here