In the known issues it looks like it says this is fixed.

Basically, left monitor I have firefox pinned, on the right monitor it doesn't appear in the taskbar.

Am I missing a setting? I simply want both taskbars to be identical with the system tray on both.

Left monitor is windows taskbar, right monitor is display fusion.

I've attached a screenshot of both, I notice the notificationy thing is also missing (I don't care about it though)

The items that are pinned do not appear on the other taskbar.

I wonder if there's a setting to make them both identical. I think windows can do it natively but without the system tray, so that's no good.

You can see Firefox for example is visible on the second monitor, but in the wrong place.

If I close firefox then you'll only see the icon on the left monitor where it's pinned.