Ukraine inherited military doctrine and infrastructure from the Soviet Union just like Russia so while the US has a much bigger industrial capacity, it’s only setup to produce equipment for US/NATO military doctrine and infrastructure. The US uses lots of precision munitions and air support instead of artillery, which is where Ukraine is struggling the most.
Lots of equipment that can be used at the infantry level without much support works great like those anti-tank missile, but anything that requires a large logistics pipeline is largely off the table. For example Ukraine hasn’t even put the F16s it has received in the air yet because they’ve been training pilots and maintenance crews. It’s just not set up to fight a war the American way whereas Russia has a large industry manufacturing artillery shells to fall back on.
Lots of equipment that can be used at the infantry level without much support works great like those anti-tank missile, but anything that requires a large logistics pipeline is largely off the table. For example Ukraine hasn’t even put the F16s it has received in the air yet because they’ve been training pilots and maintenance crews. It’s just not set up to fight a war the American way whereas Russia has a large industry manufacturing artillery shells to fall back on.