Austin and Blinken let it out of the bag last month that they want to seriously degrade Russia's military capability. They want to see Russia pounded and be unable to recover quickly
https://www.washingtonpost.com/world/2022/04/25/russia-weakened-lloyd-austin-ukraine-visit/
That in itself is a fairly contorted goal all things considered, but in sticking to Ukraine, it seems the US is just using them and setting the stage for more destruction. Its a media/DC creation that Ukraine is doing well vs Russia. They had some success with the drones etc, and US helped them sink Russia's flagship and kill Russian generals, but the Ukraine ground forces are a mess.
They are are disorganized and haphazardly led. The forces furthest up the line get the worst equipment. Many officers are dead. Weapons the US sent to Ukraine in the past ended-up destroyed and/or taken by Russians. Wounded soldiers dont get care and morale is low. Russia's tactics center on artillery pounding (400-600 rounds per day) and not taking territory per se. The longer the war goes on, Ukraine will starts to look like Dresden.
The medium range missiles US says it will give to Ukraine are described as a minimal offering that shouldn't make much of a difference. However I dont know how anyone can trust reports since US has been doing a lot more than it often suggests. In any case, US doesn't want to quit Ukraine soon and that will cause a lot of harm
Meanwhile China has banned citizens from leaving China, and the regime has given orders to sanction-proof its economic vulnerabilities. The lockdowns were never about any virus. More astute CCP observers think something is definitely looming although they like to tease and layoff to lull responses. US naval capacities are described as dysfunctional already anyway.
Best source by far for reality of Ukraine military situation is this fellow here