I played with the settings in this app to make a Yahoo search bar. I eliminated the other search engine choices until Yahoo was the only one.
I found this app to be simple and easy to use. The developer is Ozmium. I got it at the Google Play Store.
I didn’t find a specific Yahoo search bar from Yahoo or anyone else when I looked. What’s the matter? Hasn’t Yahoo been around long enough to think of this? 🤔