There’s the Comics Manager docker available at Settings → Dockers → Comics Manager and also the Storyboard docker available at Settings → Dockers → Storyboard.
Storyboard Docker — Krita Manual 5.2.0 documentation
Sadly, the Storyboard facilities are having problems at the moment:
I have no experience of the Storyboard facilities and it’s a long time since I played with the Comics Manager.
If you have difficulties with either of them then please create a new topic in a Support and Advice category.