I am trying to use this type of line in my project but having difficulty in creating it. Any help would be appreciated
Here is one approach using some of the shaping tools, along with Convert Outline to Object.
Draw a curve with three segments and apply the desired line width.
Use Fillet/Scallop/Chamfer to add fillets to the corners.
Use Convert Outline to Object to turn it into a closed curve shape.
Draw a circular ellipse.
Select both of these. From the shaping tools, use Weld. Apply fill and outline as desired.
As an alternative to using Weld, one could use Boundary.