I am creating sites for new projects and am adding them to a hub site that shows all active projects. I am adding my users as members to that site. Neither me or my users are able to see these new sites in the Hub site's site list. It seems as though the sites are not a member of the Hub site, but the SharePoint admin center says they are. How do I get this Hub's sub-sites to list correctly? My end goal is to have any sites added to the hub site show up in the site list on the hub site.
Edit: i have added a screenshot of the list of sites I can explicitly add to the Site List web part for the Hub Site's homepage.