Hi there,
Currently, we do support splitting areas. However, after splitting, you can only retain one of the regions and will need to remap the other. Additionally, you can edit your map by expanding it or making more complex edits by driving your Yarbo to draw the new boundary.
You can check this article for some helpful insights: How to Adjust Existing Mowing Areas in the Yarbo App
If you have any other questions, feel free to reach out!