X2
Would love to see some photos
If he is young, then the hens may be keeping him in line. Once he is older he will establish himself within the flock.
In my limited experience with a rooster, he lets the girls eat first. Mine is adult, but anything I bring/give, the girls get "first dibs". He will eat a bit offered by hand, but if a hen wants what's offered, he steps out of the way. Part of his job is to ensure the hens are taken care of. I rarely see mine chow down with the hens, he usually eats when they are done.
Since he is new and hiding in the coop, check him over well to ensure he has no lice/mites problem or obvious health problems - hopefully you had him quarantine for a period of time and already caught anything like this.
If he is eating/drinking and otherwise seems ok. I would just keep an eye on him, he will come around once older.
Just my thoughts.
As long as you observe