When I share our AGOL web appbuilder sites on social media, the preview is awful. I've populated the item details page, but it still looks like this:

Is there a way to tinker with the webpage code to fix this? My app is here:
https://gis.douglascountyks.org/portal/apps/webappviewer/index.html?id=f7ba6c052dc94e50b7634d737d8d1...
Robert Scheitlin, GISP, maybe you have some insight?