I suffered from this in childhood in my left ear and, three weeks ago, it hit my right ear.
Thankfully, some of my hearing came back on its own and some more came back with a week's worth of steroids. I'm currently nearly at the end of a week's course of steroid injections into the middle ear but, tbh, I haven't noticed any further improvement. If anything, I feel worse as the tinnitus has really ramped up high and I struggle to hear conversation over it.
I can't really remember how long it took to stabilise last time as it was so long ago and it wasn't treated as my parents just thought it was wax.
Someone gave me a ball park figure of 3-6 months. I also really want this tinnitus to come down as this is the worst part. It even wakes me from sleep.
I do already have hearing aids in both ears as I have a bit of age related deafness in my right ear but the prescription is totally wrong now and will need adjusting when things settle down