The navigation controls are indeed populated but hidden since the row in which the slider is housed does not have any padding – top or bottom. You can see the controls by having the below custom CSS in your plugin settings->Custom CSS tab.
.lae-container .lae-flex-control-nav { bottom: -15px;}
I would recommend you deactivate the Nav Menu Addon for Elementor plugin on your site since it is raising a JS error as seen below –
Error in Chrome Developer Console
You can also change the color by having the below Custom CSS –
.lae-container .lae-flex-control-nav li a, .lae-container .lae-flex-control-nav li a:hover { background: #7b2b2b; border-color: #d5a9a9; }
It is hard to provide customization controls for all widget elements in Style tab of Elementor.
Sorry for my late reply. Your reply has helped me a lot.
Thanks
Glad to hear. Happy to help.