As Italy and the Balkan Allied Forces made surprisingly rapid advances on the borders of the Austro-Hungarian Empire, the United States on the other side of the ocean was indeed a bit panicked.
The reason why Americans did not participate in this war did not mean they did not want to share the benefits.
It's just that the Americans wanted to play a more important role in this war. They wanted to wait until the Allies and the Central Powers were exhausted, and then join the war as mediators.
However, unexpectedly, the Central Powers had already shown signs of fatigue in the face of the Allies' offensive, and even now only two Great Powers remained struggling to survive in the Central Powers.
If Italy and Australasia really teamed up to defeat the Austro-Hungarian Empire, leaving only the struggling German Empire, it was also destined not to last long.