This will not have a negative effect on babies who are exclusively breastfed.
One way to care for new parents is to give them at least one “feed break” per day. A new breastfeeding mom (or whoever is the primary formula-feeding parent) benefits from having their partner or another family member handle at least one full feeding per day. This means the bottle should be made/given by someone else so mom can go take a break (or even a nap). It is also OK for this to be formula instead of pumped breast milk. This will not have a negative effect on babies who are exclusively breastfed.