Table view - have Types as lanes?

Hi again,

Could you let me know if there is some limitation that is obvious that I am missing? I am trying to set up a timeline where the lanes are all the entity types in my app. When I go to the “lanes” dropdown, I am not offered the ability to make a lane for any type. In this particular case, I can also see that I have a few linked types that are not in the app being offered for the timeline. That’s great as on the one hand I’m eager to build a cross-app timeline as well, but for now I’d like just to have some lanes that are based on the types in one given app.

This is a snapshot of what I see in the “lanes” dropdown:

Thanks Guys!