Hello,
If you only want a sidebar inside the specific row then you can create a separate column inside that row and simple display whatever you want inside it.
Or you can use the Widgetized Sidebar element inside a row and select your specific widget to display.
Screenshot: https://jmp.sh/HTfyJSV
Result: https://jmp.sh/P3GeOEz
If after doing this if you still did not achieve exactly what you want. Then share the URL of that page where that sample exist and shown in that screenshot. So I can check that demo page and help you out.
Best Regards.