Well, well, well. This morning, I went to watch last night's episode of Star Trek: Strange New Worlds on the P+ app for Roku on my Streaming Stick 4K, and low and behold, I was getting Dolby Vision HDR!!
I'm also now getting Dolby Atmos on several titles as well.
It only took, what, SIX MONTHS?
To add insult to injury, Paramount+ only offered me 10% off my next annual renewal (equivalent to one free month) for this six month period where HDR had been disabled.