They (the Biden admin) want to close a chapter immediately after they throw their punches at China but before China's further actions, so they can present to the world something like "this admin has acted tough on China, punched around, and get no beaten back, now China agrees to settle without retaliation". They definitely can not afford a meeting after China beats back which will come but just not immediately nor specifically in a tit for tat manner. This is about their 4 years election circle.
China on the other hand has no such circle, so when and what to throw back at US is determined by maximising the greatest and long term gain. So China wouldn't hurry up a punch according to some meaningless meeting. Therefor China is not in a hurry to meet, nor holding back the meeting (for whatever purpose) indefinitely. Note, stop such meeting indifinitely is essentially cutting off the relationship, even the USSR and USA did not do so during the hight of cold war. China for the moment and in the open is not intended to make that kind of statement. Therefor, we are seeing both sides meet just for the sake of a meeting, nothing else.
