Applying Child Theme to another site, which has its own URL

WordPress doesnt work this way. You can either have single sites like:

  • abc.com
  • xyz.com

but then each need its own system, database and setup (of course you can clone pages easily with plugin “Duplicator”).

Or you can have a multisite installation like:

  • abc.com
  • xyc.abc.com

They share ONE system and one database but are more complicated than single sites on their own.