When you connect a custom domain to your site, you’re changing its DNS (Domain Name System) settings. These changes can take anywhere between 24 and 72 hours to start working properly. Domain providers refer to this waiting period as “propagation time,” or the time it takes for changes to update throughout the web.
DNS propagation takes up to 72 hrs. Hopefully it will help you.
In that time, You can Try:
Clear browser cache or use a fresh browser.
Try to browse your site using VPN for some while.
Or wait and be patient
It will be better if you share your website URL with us.