Hi Sholinggirl
You are right, it is how long is a bit of string post ...
It depends on a number of factors such as where you live in the regions, I did a Tribunal today which started in August 2021 (76 weeks ago).
If you have any more supporting documents, then I would send those in, if they help your cause.
You could contact DWP to see what is happening to your claim.
Gary