Yes, there is a Widget for that
In your WordPress admin, go to menu Appearance->Widgets.
Drag&drop the widget “WPSOLR Facets” to the widget area your theme is providing. It could be on your theme search page for instance.
I cannot see the “WPSOLR Facets” widget in my admin or in my front-end widget area
The widget appears if both conditions are met:
– WPSOLR is setup to work with the theme search template (in tab 2.1). Widgets are not shown with the WPSOLR Ajax template. You will need to activate your Premium pack to see this option.
– The widget is positioned on a search page (pages which url contains ?s= ), or on a product WooCommerce product category page (requires the WooCommerce Pack)