At the end of the day the US doesn't see Russia as a primary threat, and they lack the resources to both fund NATO and threaten China. With the war in Ukraine having been lost, I expect that the US will leave Europe to deal with the fallout and refocus on Asia. If the war achieved its goals of accomplishing a regime change in Russia or even Balkanizing it, then it would be a different story. The US would absolutely invest into NATO to surround China from the west at that point. However, now that Russia has come out stronger, it would just be throwing good money after bad from US perspective.