I understand that can lead to unexploded ordinance however Ukraine is facing a life and death struggle right now and they can use all the ammo that they can get. Of course it's not ideal but US/Europe has very limited supply of precision ammo. And until they can increase production Ukraine needs something to use against dug in Russian positions. Ultimately the decision should be up to Ukrainians since they are the ones that will have to be doing the clean up.
clusters are banned from use by 111 countries, with a dozen more interested on ratifying the ban for a reason
this should be getting a hard no from anyone that supported the ban, anyone that has criticised russias use of them in this war, really anyone in general
US nor Ukraine have banned them so no legal issues but regarding their use, personally it should up to Ukraine to decide if they should or should not use them since they are using them on Ukrainian land. I trust that Ukraine will limit them to certain scenarios against dug in Russian positions and not indiscriminately like Russia has been. Essentially it's either use cluster ammo against or no ammo, because US/Europe has a very limited supply which they already gave Ukraine, until they ramp up production Ukraine needs at least something. But yes in a perfect world they would have enough guided ammo.