My right canine tooth has no point anymore from grinding my teeth at night. What can I get done to get the point back? (Photo)

From your photo it appears that all your teeth are flat at the edges which means your are a severe grinder at night. If you were to have a dentist add the “point” back on the canine teeth, the material would ultimately break and the canines would appear too long compared to your other teeth. Since your wearing braces, you can’t have a guard made to wear at night for protection. After your braces are removed, you should have a thorough bite evaluation to look into your grinding and what can be done for you. 

I would recommend an in-person exam after the braces are removed for evaluation and treatment options (veneers, oral appliance to protect your teeth...).