This topic seems to get brought up often in the last week. I have yet to see a reputable commentator or source indicating any potential military engagement against China in the SCS (please post here if you see any). It does not mean that China is not ready for a confrontation, just that it is highly unlikely.
As many people have mentioned before, a military engagement in SCS would require the U.S. to be the aggressor and there is no way for Trump to get enough internal support for that. If the Trump Admin is unwilling to engage Iran or Syria militarily, then China is not even in the realm of possibilities.
I do agree that the Trump Admin will try to escalate tensions with China up and until the election, but these escalations will largely be symbolic in nature and economic attacks. We might see more of Pompeo's desperate speeches like the one calling for regime change in China or maybe another speech on SCS / HK / Xinjiang. Trump would need significantly more internal support (especially from Democrats) to go beyond these gestures as the risks will be a lot higher.
Given problems at home such as COVID, racial tensions, economic / unemployment and fight between liberals vs. conservatives, Trump's best hope of reelection is diverting attention to China, which is what he has been trying to do. IMO China is waiting till election results to act. Further escalation against the U.S. by China now plays into Trump's hand of diverting media attention.