If you're unable to find the digital menus app on your Fire TV stick, the first step is to make sure your stick is compatible with the app. To check your Fire Stick compatibility, you'll need to go to the Amazon account that the stick is attached to (most likely the account used to purchase the stick) on a laptop or desktop. From there, either search for the Digital Menus by Untappd App, or, follow this link: https://www.amazon.com/Untappd-Digital-Menus-by/dp/B08PJP5R3S
On the right, click the link in blue to view your compatible devices. You'll see either a green checkmark indicating your device is compatible:
Or, a red X indicating that it is not:
If your device is compatible, close this box out and click here to deliver the app to your device:
You should now be able to find the app on your stick using the Find feature on your Fire TV homepage. Search either "Untappd" or "Digital Menus by Untappd" to bring it up:
If your stick is NOT shown as compatible, you'll need to purchase a supported device.