The Question you’re asking doesn’t apply to Fitness Plus NOT supporting mirroring, but rather the fact that those who have bought the HDMI thunderbolt adapter and it clearly stating the following: ***copy pasted from the Apple Product description on their website***
Overview
Use the Lightning Digital AV Adapter with your iPhone, iPad, or iPod with Lightning connector. The Lightning Digital AV Adapter supports mirroring of what is displayed on your device screen — including apps, presentations, websites, slideshows, and more — to your HDMI-equipped TV, display, projector, or other compatible display in up to 1080p HD.
It also outputs video content — movies, TV shows, captured video — to your big screen in up to 1080p HD. Simply attach the Lightning Digital AV Adapter to the Lightning connector on your device and then to your TV or projector via an HDMI cable (sold separately).”
So, my argument goes… That Apple has now offered limitations to what can or cannot be displayed on a large TV screen per the latest Fitness + debacle.
In plain English, this limitation conflicts with the Adapter product description which comes in around $50 per purchase.
Makes sense?