With the recent addition of synced selection and the planned changes in T68502: Outliner Sorting and T68498: Outliner: Modes & activating cameras or scenes, the outliner filter popover has become crowded with unrelated options. Some display modes like Orphan Data and Blender File use the filter popover to filter ID types. To keep consistency with these display modes, and the file browser redesign, non-filtering options could be split into a separate Outliner options popover for sorting, syncing, and drawing.
The options popover could then be drawn in the Sequences display mode to give access to the selection syncing toggle and search options.
An additional filter option to draw row icons could also be added to reduce visual clutter.