Hot off the presses, a little good news about anosmia, loss of smell. https://archive.is/dqhGD
tldr: While colds, flu, sinusitis can all cause loss of smell due to one mechanism, obstruction and swelling, Covid 19 has another mechanism. It attacks the substrate supporting the olfactory nerves. This can even lead to loss of the peripheral olfactory nerves. The somewhat good news is that they regenerate. The not so good news is that it takes a long, long time. And though it doesn't say so here, possibly in some cases the substrate destruction can't be overcome.
One thing that was recommended back in the summer was to take an orange and put it over heat/flame and burn the peel. When the outside is all burnt let it cool, peel and then eat the orange as normal.
Haven’t had to do it myself but if it helps it can’t hurt to try it. May have to do it more than 1 time. GL nothing but the best for everyone.