I want to make a curve in this part how can I for a chair

You see I want to bend a an this part into curve i want make the curve part in chair but i just can’t find the right tool or right way can anyone suggest me how i can make a curve in this corner for my chair
Thankz in advance

You can probably use the tube tool along with a custom profile to give it the shape you are looking for. Using the curve function under the tube tool, trace the path you want then edit the points along the way.

What is custom profile? What do you mean by trace the path

Maybe like this: