Physical therapy exercises after bunion surgery?

Yes. They are good...Range of motion for motion, and then modalities to decrease any swelling.
Surgery. Yes - these are a really good idea . Your surgeon can refer you to pt . They help with early mobility of the joint as well as to help reduce swelling .
Exercise caution. It's best to consult with your surgeon before you start physical therapy. Depending on the procedure performed your podiatrist can best evaluate when to start & will work with the therapist to establish reasonable goals. Await his prescription.