Hi Praveen,
Thanks for contacting Syncfusion support.
We can achieve the collapse of content to the left direction using the Gird layout. Based on your requirement, We have created a sample using the Grid layout to demonstrate how content can be collapsed. Please review the attached sample and let us know if it meets your needs.
Regards,
Arunachalam K
Attachment:
ContentCollapseSample_f60fec4c.zip