Did you configure the IP of your host?
It seems you bought a domain name but your website isn't hosted on the name provider.
Are you hosting with your own server?
I already wrote to them and they replied this:
"We have checked on your domain and see that it has default nameserver, kindly make sure that the your domain is pointing correct. Kindly check with your hosting and make sure your domain is pointed to your hosting server IP address.
Kindly wait for the DNS to propagate online. It may take around an hour up to 48hours for the DNS to fully propagate online.
You may monitor the propagation through the third party DNS checker from this link https://dnschecker.org/
Once domain is totally resolve and still not accessible online, kindly check with your server hosting for further assistance."
Discussion
The site is hosted on isolabellart.carrd.co but isolabell.art when I go to add it as a custom domain turns out not to be registered.
I no longer know what to do.
You should be able to place the host url into the control panel of the name provider.
There use to be a place to redirect the site.