Thanks for reaching out to the Apple Support Communities, Al-MikeL!
It sounds like you’re having an issue with viewing the desktop website for Yahoo on your iPad. First, Check out this article to Browse the web using Safari on iPad. To view the desktop website, you’ll need to follow the steps in the section to Change text size, display, and website settings.
If you continue having issues viewing the desktop website, check out this article to Clear the history and cookies from Safari on your iPhone, iPad, or iPod touch. I also recommend checking out this article with steps for How to force an app to close on your iPhone, iPad, or iPod touch and quit Safari. Once it’s closed, Restart your iPhone, iPad, or iPod touch and test to see if the issues are still going on.
Let me know the results and have a wonderful day!