Social-link-settings not found

i was trying to add social profiles link in footer of the webpage with it’s logos, but found i have to create own footer template for that, but u found social-link-setting doctype in form customize but cannot open it , when trying to open it via action it says doctype not found it is unavailable. is the doctype is for footer or some other in website module as it is a child table of website and why is is not found but available in customize form. below are the screenshots attached for the error and customize form, thanks in advance