My sad news is....
Your going to have to pull the cluster.
Pull out the front seats.
Pull out the steering column.
Tape up the dash.
And be ready to get your hands cut up
And go easy on the wires and connectors.
Be prepared to replace or repair the cir boards.
After the cluster is out find a reputable repair shop in your area .
My bet is the spring that resists the needle movement is free to move or not adjusted correctly, (should not happen all by itself).
There may also be a 0 stop that may have broken off
I feel your pain.
When I pulled my cluster in late 22 I knew I should send the speedo out to have it repaired. But I did not and now I'll be pulling it this Winter