I don't think it's delusional, I think it's intentional. The people writing and backing this bill are fully aware that the sale is not going to happen. The sale provision is merely there so Congress can say they're being reasonable, that they're not trying to take TikTok away from the millions of people in the US that use it. That if it ends up having to be banned, that's on China for not accepting the "reasonable" alternative that was presented to them.

Whether or not most TikTok users in the US will buy this bit of malarkey is another questions.