Move to workspace left/right shows workspace’s switching indicator, but I can only go between 1 and 2 (dynamically created probably) and all windows move with me.
Previously set (before upgrading to 18.10) hotkeys can be found with dconf: /org/gnome/desktop/wm/keybindings/move-to-workspace-left but they do not work. Also moving windows left/right should move only one window, not everything.