Laptop users are complaining about a lack of clickable scrollbar.
When they only have a trackpad/touchpad, it’s difficult to see the entire list. Some devices don’t have the ability to scroll like a mousewheel.
Must be a very old device, if the trackpad does not support the two-finger scroll gesture, nor trackpad-edge-scroll 
https://www.perplexity.ai/search/how-do-older-laptops-with-trac-khm3wgGvR7eg4UnqBdIeiQ