If biden decided to strike hard then China as well North Korea (potentially) will have a reason on joining this war thus making the other member of NATO to join as well
The reason why Ukraine has become so close to NATO that it has caused Russia to go on a rampage cannot be separated from Joe Biden's behind-the-scenes intervention as US president and his son's energy business being there. China itself is not entirely happy, however the condition of bilateral relations between China and Russia will definitely be in this war directly, which is even more pleasing to the US because they are the ones who pit the two countries against each other even though they are still in the same family and are brothers. The Ukrainian president did not act wisely in bringing himself closer to NATO, regardless of economic and other matters. The point is never to take sides, because he is flanked by 2 blocks that are very heavy in history.