Cutting the cord but didn’t get the right advice

We are a family that rents and we’re cutting the cable cord to cut down costs since we need to upgrade to unlimited streaming to meet everyone needs. I spoke to reps at two different stores for advice and came up with the following plan:

Mohu Leaf 50 antenna (in bedroom due to Northwest facing windows)

Tablo 4-tuner DVR (attached to antenna to record multiple shows and provide connect via Wi-Fi connection to downstairs router)

Apple TV 4K (128GB) attached to current dumb TV in living room as a monitor.

Ordered everything online and started set up and found out that there is no Apple TV app for the Tablo four DVR. I figure there’s gotta be a workaround since two people recommended this combination. Is a Roku stick the only fix?

Edit: wrong word choice, the tablo is meant to be a WiFi connection between the antenna and the Apple TV so we don’t need to run a cable between levels in our rental condo. The Apple TV is located next to the router which is downstairs.