rmx Spinebot does not understand the contents of images very well, so it is easier to get a better answer if you explain the situation in words.
It is unclear from your screenshot because the toolbar is cropped, but if you are not applying any filters, the event keys may be hidden in the tree view. Click the visibility dot next to the Event node to hide the Events timeline.

Also, based on the information that the attachment timeline is not displayed, it is possible that the Sync
button is enabled. This aligns the contents displayed in the dopesheet view with those displayed in the graph view, hiding timelines that are not necessary in the graph view.
In the following example, when viewed in the graph view, the head
bone has timelines for Rotate
, Scale
, Attach
, and Events
, but since only the rotation curve is displayed, only the Rotate
timeline is displayed in the dopesheet view with Sync
enabled:

As such, the display content changes depending on the options selected. If you notice any issues with the editor display, please upload a screenshot that has not been cropped so that we can quickly identify the problem.