I have created the following site columns inside our root site collection:
and we added some test data inside the related list which have the above site content type and site columns. after 24 hours I checked our Search Schema >> Managed Properties >> I found that 3 managed properties were already created for us repressing these columns internal names (ContactCustomerName = ContactEmail + ContactLastName):
but there is not any crawl property linked to them. Can anyone advice on this weird case please?