With Philly still trying to compete in the East, I doubt they send him to any playoff team in the East.
A few options in the West, particularly the Clips and Mavs. However, if Harden has any say in this does he really want to go play either of those places where he’ll have the ball even less?
A couple dark horses would be Portland and NOLA. If NOLA wants to go for it this year, a swap with McCollum makes some sense for both sides. Alternatively, does Portland float Simons out there as a desperate pitch to pair Lillard with another star and keep him given the lack of other options? It’s a God-awful fit, but I could see them doing it, especially if they don’t have to give up Scoot in the process and could keep Dame happy.
Philly is just not in a good position here. If no miracle trade materializes that keeps you at faux-contender status, it almost makes more sense to fully blow it up now and put both Embiid and Harden on the market and try to really restock.