When a guest user access a hub site that displays news from sites attached to the hub, it does not work (no news). It only display to organization users.
The guest is able to access the sites attached to the hub and see the local news so this is not a permission issue.
Also, guest are able to see news from the hub when I use the modern search result web part to display news from sites attached to the hub. So why the news web part is not working?