TemplateToaster provides an option to style toggle menu icon, you can set color, border, stroke thickness , stroke color within TemplateToaster.
Go to TemplateToaster -> desktop view -> Menu tab -> submenu -> Toggle -> set style properties as per your requirement.
Also, to set toggle button alignment to center please check below steps -
Go to TemplateToaster -> desktop view -> Menu tab -> submenu -> Toggle -> Alignment.
To set menu items alignment to center, please follow the steps -
Go to TemplateToaster -> Menu -> Menu button -> Typography -> Alignment.