I assume we’re very quickly reaching the point of saturation where more anti-tank or manpad systems won’t make a difference. The issue for Ukraine now will be more of the “do we have enough well trained soldiers to operate them?” nature.
Plus of course the rest of the military infrastructure (sigint, airforce, artillery, armoured vehicles etc.) is likely severely lacking and it will be required if they are to push the Russians back. Till then they are just hoping the Russians give up on account of high casualty rate, while the Ukrainian cities are getting pummelled.