It’s not speculation just because they don’t have a photo of the prompt (of which I’ve received personally) - the story is in plain sight in the ratings themselves, go have a look.
Here’s another article from an apple friendly source
The screenshot you posted is the same format as review prompts for every app I've seen one on. It's literally just "Enjoying <app name>?". Sure, they could go the extra mile to disambiguate for those that aren't familiar, but this is pretty simple stuff.
It is definitely confusing when it is coming in the middle of a playing podcast. Just look at the App Store reviews - they are all for specific podcasts, not the app itself:
The fact that some people don't read before clicking isn't something I'm going to hold against Apple. The prompt isn't a block of legalese, and it doesn't claim in any way to be asking to rate the specific podcast.
My delivery tracking app has popped up the same screen asking me to rate it, but I've never figured it was asking me to rate my UPS driver.