Help getting started with Roku devices, including setup, connecting your device to your TV, linking a Roku device to your account at my.roku.com/link, adding channels, subscribing to services, and more.
If you are trying to access the AV input on the Roku home screen, you will only be able to see the AV input if you have a Roku TV. Otherwise, you will not be able to access the AV input through the Roku home screen, but rather through your TV input.
You have actual TV? A Roku TV!! Apple TV and Fire TV aren't tv's (yes Fire tv are tv nowadays but at one time it was called a tv when it wasn't), where the Roku TV is an actual TV with a screen, and always had screen when called Roku tv.
settings> inputs> scroll to AV input> add it, rename it if you wish.
I found the answer by trial and error. In Settings/TV Inputs, select the A/V input, and select Remove, then Confirm. Once the input is forgotten, it will reshow as an unfinished option in the TV Input menu. Just reactivate it, and it now shows up in the Home screen.