Hi jus to check , Bellamy formula milk has no DHA content .. So if I'm going to feed my ️baby this brand of milk, does it mean I need to supplement his diet with DHA fish oil drops ?

According to Bellamy's fb page their formulas have enough polyunsaturated fats for healthy development and that it is against the organic certification to add omega fats from any source including fish. Plus the extraction process to obtain these oils uses nasty solvents which is also against their regulations. I don't think you need to supplement with DHA - but best to speak to your PD.