Is it worth testing different devices on native ads campaign?

[btaliat]

For the past few months now, I have only been optimizing my native ads campaign on desktop. I have checked the performance and other metrics considered important. However, a friend of mine told me that it is also important to check other devices to know how fair my native ads campaigns are working.

This got me thinking. That's why I am asking if it is worth it to be testing all devices to know how fair my native ads campaigns are fairing?