I would not expect a new indentation to occur prior to hyaluronidase injection. But if it were to, then I would probably recommend microneedling with PRP, fractional lasers or filler to treat the indentation.
If you could elaborate further on what you are referring to in regards to damage from hyaluronidase that would be helpful. Also what location (presumably on the face) you are referring to. Photos are also important to figure out what the issue may be. All the best!