When I select the pen / eraser / lasso the toolbar disappears.
I frequently switch between pen colours, lasso, eraser, highlighter etc. Having to click on the main toolbar icon to bring up the drawing related tools is an extra tap/click I do 1000’s of times a day.
I would be great if the pen / highlighter / eraser / lasso / pen size/colour sub-toolbar remained visible unless manually closed (X button).