There’s absolutely no way to get the tileset tab to show up. Please, does anyone know a fix?
It’s already “shown up”, you’ve just popped it out into a separate window, it’s near the middle of your screenshot. You can either drag it back onto the panel where you want it (it might take a little scooting it around to get it where you want it, don’t give up too quickly), or you can use View > Views and Toolbars > Reset to Default Layout.