UNC has 23 field players who may currentky be available (injury reports are not public, it may be less)
of those 14 played Sunday. That leaves 9 who did not play.
Of those, four are defenders. someone like Mara has real experience and could perhaps play, but teams do not usually sub their defenders a lot unless necessary, like for an injury. But sure, Mara can play.
The others either are freshmen who did not come in with accolades, or have been deep bench their entire career.
Maynor may not be cleared to play; I don’t know. Her season last year ended in injury. She DNP in the Quinnipiac blowout (10 subs used) which tells me she may not be 100%?
the other 5 are MF or F, positions you do sub a lot. But of the ones who did not play, they are all either unheralded freshmen or over their career they have always been deep bench, only playing in the occasional blowout.
Fr Roossien has played the most, arguably well outpacing her HS accolades. she seems to be the most trusted of the 5 who do not play in close games.
not every player at UNC is ready to play against a top 25 team. we do not know who is 100%. It is entirely possible UNC is using all the subs that they should in most games.
the actual substitution rotation in terms of when and where is certainly up for debate. But I do not think there are any potential major contributors or future stars languishing on the bench right now.