The short answer is that there's very little reason not to give hyaluronidase. It is unlikely to have a downside and, aside from the injection itself (it does burn, so it's not the most comfortable treatment) it's a reasonable thing to do.
However, it was long enough ago so that I'm not sure it's going to do what you hope it will. And it's not clear - and for the same reason - that this is actually a Tyndall effect. More likely is that enough of the material has dissipated on its own so that what you're seeing is not actually the hyaluronic acid itself. I'm not sure what it is - it could be an appearance that's unrelated, or some scar tissue, or hyperpigmentation, or something else.
Either way, you should be interacting with a doctor you're comfortable with, and who can respond and explain things to you so that you're on the same page. If this doctor is the one, great; if not, you should try to find someone else. Many different types of doctors, including dermatologists and plastic surgeons, may be able to help you with this. So, as troublesome as it is, you should probably re-start the process of finding a doctor.
I hope that this helps, and good luck,