Turning a webflow to a subdomain of another

Hi all,
I have two webflow sites, I want to make one a subdomain of the other. they are both hosted on godaddy. I tried a couple of things, but its not working, anyone familiar with the process?

Here is my site Read-Only: LINK
(how to share your site Read-Only link)

This should be pretty straight forward. Take a look at Add a subdomain to my Linux Hosting account | Linux Hosting (cPanel) - GoDaddy Help US

Of course the specifics for you depends on which product(s) you are using with them. Best to ask there.