Gerber probiotic and vitamin D

Him, I’m a FTM to a 3 month old baby girl. She is currently on Enfamil Gentlease Neuropro formula and she also gets Gerber probiotic drops daily , which I think has been helping her poop daily. I read somewhere that if your baby is formula fed then they don’t need vitamin D drops? Well , the probiotic drops that I have been giving her does not have vitamin D in it. Today I sent my husband to the store to get a new bottle and he got the one with vitamin d in it. Is that okay?