Currently, when you are setting up a Timeline view, you only have two options for "Group by". These are "Project" and "Project and Section". I would like to see more options for grouping such as Labels, Custom Fields, Assignee, Team, etc.

Bonus feature:

Add the ability to group by more than one option. Primary Group, Secondary Group.

For example if you are creating a Content Calendar:

Primary Group: Custom Field Department (Marketing, HR, Shipping...)

Secondary Group: Label (TikTok, Facebook, Instagram...)

P.S. I had to submit this Feature Request under "List View" as there is no option for "Timeline View"