Hey, I’d like to suggest the addition of icon templating via icon_template for template binary sensors.
Therefore you’d be able to have one icon if true, another if false. This would be good for icon such as a closed and open lock for example to change the badge icon that is shown. Since I specifically want it as a badge icon, I can’t use the template sensor to do it, as the badge displays the state rather than the icon.
Icon_template is already available for template sensors but unfortunately not for template binary sensors.
Also there’s an example of icon templating on the template binary sensor page which seems like its been copied from the template sensor page, this made me try for quite a while before realising its not supported!