FYI, This is a known issue regarding the new macOS Ventura System Settings for Background Apps configuration. @etresoft talked about this "Background Apps" System Settings panel in another thread. Seems like bringing this out to the user was not done well and Apple never provided any information about how to have their apps handle this new "feature" setting. Best to just ignore the Background Apps System Settings panel alone for now until Apple straightens things out with the feature and developer information. Sorry I don't have a link at the moment to the other thread where @etresoft discussed some these things.
The "open" is a lower level command line utility used to launch GUI based apps from the command line (perhaps can do more than GUI apps, but that is all I've ever used it for myself). Due to the improperly implement Background Apps feature in System Settings it is bringing up this utility without providing more information (@etresoft discussed why it does not have this information in the other thread).