I want to point out that the fraction of imports/exports between the USA and China is roughly symmetric (by monetary value). In 2022, about 16% of China's exports were to the USA; in 2021, about 17% of the USA's imports were from China.
That being said, you're probably making a valid point about which items are flowing, not just the raw value of goods.
Also, I would think it's generally easier for a producer to find new buyers of what it's already producing, than for a buyer to find a new producer for what it needs.
Edit to add: If we look at the ratio "Exports/Imports", we have about 0.3 for the USA with China, and we have about 3.3 for China with the USA.
About 16% of China's exports in 2022 were to the USA. It would certainly be a significant hit, but to suggest there would no longer be adequate demand is unlikely to be true.
For example, Russian oil exports lost a lot of their direct importers, yet demand has not dropped significantly or in a way that is harmful for them. The volume of their exports has remained relatively constant, but the fraction of the total that different importing countries represent has changed. Even the price dip recovered.