Then why does he keep talking about making a deal? Just last night he ranted about a "big, beautiful deal" that was going to be coming soon.
If Trump was interested in enacting tariffs to launch a deal, it could make sense to talk big about how the tariffs are here to stay. Show that you're not interested in negotiating to make other powers more willing to concede.
But if Trump is trying to onshore manufacturing with these tariffs, talking about making a deal makes no sense. Plenty of people are convinced these tariffs won't stay for more than a few months at most. This is in part because they think Trump wants to make a deal given how we've already seen him backtrack on tariffs, and so they won't onshore. Letting these rumors fly doesn't help Trump's ostensible goals at all. He needs to crush those rumors, not help stoke them.
I'd also point out that even if you think Trump should make a deal with country X but shouldn't make a deal with country Y, there's a problem. Even if you think in that way, Trump making a deal with country X will generally signal to people that he's willing to make deals. Plenty of people will convince themselves, whether that's true or not, that after making a deal with country X, Trump will eventually make a deal with country Y. Which means that they won't bother offshoring from country Y.
In short, making deals with any country is going to make the argument for reshoring weaker.