The team states on reddit:

By cursor movements we don’t mean mouse movement, but only the typing indicator. Mouse movement is not recorded. It is only shown when you choose to collaborate with someone by sharing access to view or edit the document to make the collaboration possible. Moreover, the contents of your documents including these movements, comments, and replies are end-to-end encrypted, so that no one, not even Proton, can see the contents of your documents.

I’d assume that is coming later on… Step by step.

Different teams, different products. One thing doesn’t exclude the other.