Thanks for the reply. I've spoken with this company and I am waiting to be fit in. Www.floodgrout.com
I've also seen certain inserts on YouTube under trench less pool repair.

As for the new concrete it was done right before the new plaster. It is stamped concrete so I don't think it will be matched easily.
I am reading now we should have done a pressure test when it was opened but I didn't know then. I guess that's why hindsight is 20/20

I will be calling a leak detection co tomorrow and I will decide what to do from there.