Thanks for your reply cjmnews,I tried reducing the text and closed zoom with no luck.I am guessing that you are in Safari to see this script. The pinch is showing you the 2 tabs you have open.
Have you tried rotating the iPad to landscape (wide across) to see if that helps?
Another possibility is your text size is larger than the middle of the slider in Settings->Display & Brightness->Text Size. You may need to reduce the text size on some sites to see everything properly.
There is also an Accessibility feature called Zoom. Double tap the screen with 3 fingers to get out of Zoom. Most people turn this off. I can’t get the split screen that you mentioned in Zoom mode though so I don’t think this is it.
If there is a specific app, let me know and I’ll try to get better information for you.