Can a foot arch fracture aggrivate plantar facsi?

Absolutely. The plantar fascia ligament plays an important part of the foot arch structure as do the bones. If you fracture a bone considered part of the arch then it could place more stress on the plantar fascia ligament for support. See a podiatrist for evaluation and treatment if you have this issue.
Without Question. Arch fracture can certainly aggravate previous plantar fascitis. Get your bone fracture healed with immobilization when healed the fascitis may be gone.
Yes. The plantar fascia can be irritated by any foot fracture that must be immobilized. If you are in physical therapy, your therapist can treat your plantar fascia pain.