By default, Infuse will group the content from multiple libraries into the single Infuse library.
However, if you want to keep things separate you can add direct links to different Plex libraries by creating Favorites. This can be done by browsing the Plex share in Infuse > Settings > Shares > Share Name and adding Favorite(s) for the libraries you want to access.
Thank you, that also worked for me. I really didn’t find that intuitive at all, and it took me multiple threads to figure out (This one finally did it).
If I go to Settings, Library, and look under the name of my Plex server, there’s a favorites star next to all my libraries. Why is that, when they are not favorited, and why can I not set them as favorites there, but have to do it through Shares?