I was pretty much this same situation: 3 PW2 installed and permitted in December 2019, SGIP and PTO delayed due to NGOM nonsense.
(I had PV installed in early summer 2019 and already had PTO for that system.) I received PTO for my PW on 7/30/2020.
Now i'm facing perhaps a different SGIP issue. My installer applied for Large-Scale Step 2 and we had gone through several rounds with PG&E and I understood PTO (and the NGOM issue) to be the only thing preventing reservation of my funds; then COVID hit. My installer furloughed their entire service department without telling me and my application sat unchanged for a few months. My application says "Suspended" on the SGIP status Website, but my understanding is that Step 2 is now full. I've been dealing with a very unresponsive and unhelpful service manager. He is complaining that he can't find a contractor knowledgeable with SGIP to move my project forward. (This after telling me that residential wasn't open for Step 6 yet and all projects were on hold.)
So I'm curious how your delay on PTO has impacted your SGIP application, if you are still on Step 2 and what your current status is at the moment. I tried calling the PG&E solar center and was told I can't talk to a live person from SGIP. I emailed them and got an auto-reply that they are reading emails from about a month ago... Not a happy camper since my incentive was estimated at about 10k.