Pretty much any modern Android tablet or smartphone will work for this, but "modern" can go back quite a few years. The team behind spacedesk says that it supports Android 4.1 and higher, which is ...

You need a fairly recent, fairly premium Samsung phone or tablet to use DeX: There's a full list here, but any Galaxy S phone or Galaxy Fold phone launched since DeX made its debut in 2017 will do.

And on the Google Pixel Tablet, it does work pretty well. And in this article, we’re going to show you how to use Split Screen on the Pixel Tablet, and all the apps that work with it.

That means I can use a keyboard and mouse and expect it to work whether it is connected to the PC or the tablet. The OnePlus Pad 2’s keyboard folio case works even when detached.