Did they approve your medical?when did u request?
I had the same situation but i used the same medical done for my visa extension in march and sent to them on 26 March but no update yet.
Your file must be processed by local visa office not through NS sydney , may be delhi or bangalore.
same here , i don't think anyone has received the medical in last 4-5 months?
Yes Average time for Inland is 13-14 months .
Feb 2019-getting in March 2020.
But keeping this current situation in mind , may extend 14-16 months.
Fingers crossed , hope someone finds the solution for COVID-19 .