I'd assume by now the share of mobile browsers has gone up significantly. Making the site a bit more responsive should be a quick but welcome win. For now I suggest simply moving the sidebar items to the left on mobile. <img width="505" alt="Bildschirmfoto 2020-01-21 um 21 07 41" src="https://user-images.githubusercontent.com/68024/72839269-43e20880-3c92-11ea-9016-02adf4338de6.png">
I'd assume by now the share of mobile browsers has gone up significantly. Making the site a bit more responsive should be a quick but welcome win.
For now I suggest simply moving the sidebar items to the left on mobile.