It is all about election. Biden administration can't appear to be weak on China but at the same time it doesn't want to rock the boat especially before the election. It wants China's help in a few global issues but the US is unlikely to compromise and might even escalate for the sake of election. Therefore, any detente is unlikely to hold.From that BBN article it really looks like the Biden admin is doing the absolute bare minimum necessary to placate the frothing anti-China wing-loons of the GOP. Perhaps they really do want some kind of detente?
I am very permissive in any detente due to the fact that the political environment in the US has deteriorated so much and hostility against China within the political establishment, the general population, the MSM and elites are at extremely high level. Moreover, there is a consensus within the US from both parties that it is now or never to defeat, weaken or break China.