Timeline Show - Hide Sections, Tasks, Subtasks Sidebar Option

Just like we can show and hide the left sidebar with all the projects and reports,

It would be great if in timeline view, we could also easily select a Collapse All Tasks and just show what the picture attached calls “Task Category”

And quickly be able to expand to “Show Tasks”

And Quickly be able to further expand that to "Show Subtasks’.

This seems like a really important feature. Without it, I’ll have to keep using Instagantt