Waiting for Parts

I have a 2019 Cadillac CTS 3.6, and currently I’m waiting on a replacement transmission to arrive at my dealership. About 9 weeks ago I took it to my local GM dealer after I noticed shuddering during acceleration and weird shifts. They diagnosed it and said I need a new transmission and that it’s covered under warranty. Awesome, I was glad to hear it. However I have now been waiting 9 weeks for this transmission to come in and they still don’t have an ETA on when it will be delivered. They supplied me with a rental and I still have transportation, however I’m getting very irritated that I’m having to wait this long and nobody knows anything. Is this a usual wait for a replacement transmission nowadays?