No, a dislocation cannot heal itself. The dislocated joint has to be relocated, and then depending on the cause of the dislocation as well as on the associated injuries which can occur when dislocation happens, treatment can sometimes be operative and sometimes non-operative.

No, A dislocated ankle has to put back in place, usually with surgery to stabilize the ankle.

Yes can heal if reduced and in appropriate position with protection. If unstable after rehab then surgery would be required. If patient has certain connective tissue diseases with other joints having looseness then early surgery may be indicated. Surgery in 7 YO rare unless ligaments interposed is rare. Good luck. Hope this helped. DrG