Infant care queries?

Hihi. My LO is attending infant next week. I’m hoping to give EBM to the Teachers. But at times my LO will not be able to finish all the milk in one go. Can I check, what will the Teachers usually do? Or is giving formula milk easier for the infant care Teachers? I’m worried about them throwing my BM away. As I am already struggling as I do not have much BM to start with. Have been mix feeding since birth due to Low supply. So all that EBM are Super precious. Please help! I need advise! Thanks