Android tablet, that is. If it's an iPad, you're SOL completely.
Even funnier is that the new native app for macOS [0] (i.e. not using Electron) is made with Catalyst… a tool made for porting iPad apps to macOS.
Somewhere, someone at WhatsApp works on a version of the app for the SOLE PURPOSE of porting it to another platform, while NOT releasing the original. It's completely baffling.
They have changed it now. You can have first class clients on both a tablet and a phone. At least, that's how it is on Android (have WhatsApp installed natively on a phone and a tablet, also use it via web client on desktop).
You can use the web version, but it sucks on a tablet.