EV-CPO also shows 2019s with HW3 and pano roof.
So they're definitely still manufacturing the pano roof, it's just not available on their website. Maybe you can't custom order one with a pano roof anymore, but you should be able to find an unused inventory unit with the pano roof that meets your specs and hasn't been used.
I wonder why they're making it seem like the pano is no longer available. I'm sure there are some people passing on the car because it looks like you can't get it anymore.
Having it so hard to buy the pano roof also probably makes the stats on the pano roof look worse. They sit manufactured and unsold for longer, so the pencil pushers will probably recommend completely getting rid of it altogether.