User story maps - need a non-aha object

When crafting out a story map, I need to be able to put in note boxes that are not actual stories or epics otherwise it pollutes the rest of the stories.

This has already caused friction and grief in managing in a multi-person product team, and being able to start a story map, just have a note card, with the option to later turn that into a story or epic object, is the only thing stopping me and the rest of the team from more broadly adopting the User story maps feature.

Until then, going back to Miro, which is a shame because I want Aha to be our single system of record on an important artifact coming out of discovery and product research.