I wouldn't say that, USF feels even more filled with munition sinks than Wehrmacht.
Like most, weapon upgrades and grenades. Bunkers, like Wehrmacht. Pintle MG upgrade like Wehrmacht, but only on Shermans unlike Wehrmacht - though it does cost 10 more. In addition to that, USF has plenty of walking munition sinks - REs basically only technically do damage and exist to spend munitions on suppressive fire, M20 has a 70 munition upgrade like the 222 but unlike the 222 mostly exists to lay 60 muni AT mines later game since its gun does no damage outside of close-range making it really hard to be worth microing into combat when the 222 can more realistically kite and kill infantry, 57mms need to spend 30 munitions every time it fires at any vehicles that are at least PIV-level in toughness, Stuarts are only really useful with their (expensive) abilities. Some of their commander options are even worse about this, like Greyhounds.
I feel way more likely to go "OK I got my upgrades, now to make some strategic choices with my munitions" on Wehrmacht than on USF where it's more like "I NEED MOAR MUNITIONS FOR SOMETHING"...when I'm not losing, of course, which is not common when one is playing Wehrmacht.
bunkers--> same for Ostheer
m20 upgrades and mines? --> same for Ostheer
sherman mg upgrade--> Sherman already has HE rounds so its not necessary for it to have mg. (little better than p4)
stuart? ---> Ostheer doesnt even have an equivalent that comes out so fast. (teching)
And the BIGGEST reason Ostheer needs munitions more than USF (but not by much) is because vanilla rifles > grens any day. Even with lmg the grens will have a hard time vs vanilla rifles.