The trick is to take advantage of the Dynamic Widgets plugin because WordPress doesn’t make it easy to select where to show what on what pages, etc. There’s a video to help out on how to achieve this which is being used on the demo site. The video tutorial is here:
https://www.styledthemes.com/encounters-theme-setup/133-how-to-publish-widgets-to-select-pages
I would use that actually instead of the setting in the Advanced text widget because it has more flexibility.