You need to map your Yola registered domain to Wordpress servers. This is done within the Yola DNS Management facility. It is straight forward and will usually be completed within 48 hours of setting it up and generally much faster. There is no additional cost to do this. Domain Management will be retained by Yola as will the billing.
You need to refer to the tutorials
Your other option is to transfer the registration of your domain to Wordpress. This may have additional costs by WP. In this case management of your domain would subsequently be managed and charged for by WP
Thank you Gop for your excellent reply. It is indeed possible to use your Yola bought domain on another webhost.
I'd suggest you contact your new website host and ask them for the nameservers and IP addresses to which you need to point your domain. You will then be able to add these via your DNS setting as shown in the shared Yola Tutorial above.
Let me know how this goes and if we can assist you further!