This could be a DPI issue. Please see the suggestions in the following threads:
https://support.google.com/chrome/thread/48361981?msgid=52353936https://support.google.com/chrome/thread/49617169/chrome-menu-appearing-off-screen?hl=en
Meanwhile, you can open settings by typing chrome://settings in the address bar. Or press Ctrl + Shift +Del, which takes you to chrome://settings/privacy.