Please tell me that my very expensive Apple TV 4K is capable of displaying the full 14-week guide and I have overlooked something. Surely Tablo is fully supporting a $150 Apple TV just as much as a $50 Roku when it comes to the guide listings.
Since you have been around for a few years, i assume you are referring to the legacy Tablo. It does not have the 14 day live tv guide for AppleTv.
The newer white Tablos have the full guide free with the AppleTV devices. The older black Tablos you have to pay for the guide or only get 24 hours for free I think.