Thanks for your request and votes. We are working on this feature for Word on iPadOS.
-Akshay BakshiLilly commented
You guys gotta get this done. It’s the cornerstone of iPadOS; if I can’t have two documents next to each other it negates everything I’m doing with the ipad. Ive spent the last hour frustrating trying to use Notes just so I can have two word processors next to each other & I hate the Notes app. Is anybody even working on this? This should’ve been figured out long ago