Commercial Fixed Wing
Flight Attendant Current
Communication Breakdown; Other / Unknown; Physiological - Other; Situational Awareness
Deviation / Discrepancy - Procedural Published Material / Policy; Flight Deck / Cabin / Aircraft Event Other / Unknown
General None Reported / Taken
Company Policy; Human Factors; Environment - Non Weather Related
I took the insert of the food catered for the pilots up to the flight deck prior to passenger boarding. The Captain asked me to set it on the jump-seat behind him.  During boarding; the Captain came out and told us that the First Officer does not wear a mask in the flight deck and asked if either Flight Attendant A or myself would be willing to come up to the flight deck if the Captain needed a lavatory break in flight.  We both said that we would not be comfortable with coming up there if the First Officer was not wearing a mask.  Upon landing; I realized that the insert of flight deck food remained in the flight deck until after landing.Better CRM between flight deck and flight attendants if this situation comes up.  I honestly don't think that anyone even thought about it.  Flight Attendant A and I just knew that we were not going to put ourselves into the flight deck if the First Officer wasn't wearing a mask; which we would have had to in order to grab the insert.  But it absolutely was not intentionally left on the flight deck for takeoff and landing on our part.
Flight Attendant reported the FA crew were unwilling to enter the flight deck because the First Officer would not wear a face mask.