Apples own design guide for requesting reviews, the guide for which they use to reject apps or app updates stipulates:
"Avoid interrupting people while they're performing a task or playing a game."
I would say mid podcast certainly qualifies as breaking that rule. They know exactly what they are doing when they ask for ratings mid-podcast and the reviews show it. The fact that it is confusing users would be enough for Apple to remove the app from the App Store for review manipulation if it were anyone but themselves. Again, take a look at the review section:
https://apps.apple.com/us/app/apple-podcasts/id525463029?see...