I called 1-800-842-7647 (Canada Border Services Agency) and asked for an application status update. They said no one is being approved in weeks and shockingly, Canada has no record of my Nexus application, both when looking up by PASSID number (I have one from a currently active GE membership expiring soon) or full name and birthday. They said to call CBP and have them check the application.
I called this number today, Thursday, April 06, 2023. Someone answered almost instantly. He was very nice and helpful. He looked up my application, and said that my application is in the 2nd to the last stage, and that I'm ahead of most of the 300,000 waiting applicants. I have no idea what "2nd to the last stage" means, but it sounds good!
I applied in September 2022, so I'm only 7 months in at the moment. We'll see what happens.