Accessible app for controlling Visio smart tv

iOS and iPadOS

I just got a new tv with smart tv functions. I've already gotten help to set up my Netflix and Hulu+ and will soon be doing the same with my Amazon Instant Video. Of course, I can't use the smart tv functions, because the tv doesn't speak. I can use my Apple TV for Netflix and Hulu, but can't use Amazon Instant Video with the Apple TV.

It occurred to me that perhaps there might be a remote control app that can control Visio TVs and that includes the smart TV functions. I looked on the store and did not find a Visio app.

So, has anyone found a Visio app or a third party app that is accessible and that can control the smart TV functions as well as the regular functions?