I just contracted a cloud hosting with the hostinguer company, previously I made the purchase of a separate domain that already migrates with them, I created a subdomain but when configuring my cloud hosting it asks me to insert a domain, which is no longer valid because I already have registered in another hosting, in the same way I can not use a subdomain? If so, how would it be achieved or what steps should be followed to redirect from my domain hosting to that cloud hosting but with a subdomain, for example patito.com is my main hosting and I want feo.patito.com to redirect me to that cloud hosting .
In your main domain (patito.com) you must look for the domain administrator, then identify the zone editor. Once inside you must add a type A record , it will ask you for a name, which in your case would be feo.patito.com and an IP address that is the real location of your subdomain (it can be on the same main server or a different one)