For example; https://beta.musicbrainz.org/artist/ceafb0a9-6dd7-4b95-962a-b34be6dc4f35 is a label and is credited as being the entity behind "design" for several releases.

I have also seen other graphic and photographic credits for what are ostensibly labels in mb system.

....

[18:30] <ApeKattQuest> hmph, why doesn't release-label have "design" relationship
[18:31] <ApeKattQuest> i mean https://beta.musicbrainz.org/artist/ceafb0a9-6dd7-4b95-962a-b34be6dc4f35 is a label right
[18:35] <reosarevok> Does look like one
[18:35] <reosarevok> Maybe we should have label versions of those
[18:35] <reosarevok> Maybe there's even a ticket