Exasperated, I checked the forum and found a 2019 thread about rattling – one poster suggested to check the sunglasses holder, because they had a similar problem and found that noise from that sounded like it was coming from inside the dash. I did that and found in the holder, along with my sunglasses, a very small loose metal socket. Guess maybe that was mistakenly left there during the windshield replacement Took it out and, what do you know, noise gone.
Thanks fellow Ascent owner (note – probably should have posted this in another forum – sorry, relatively new to the site)