Publishing on your custom domain requires one-time support from your developer to create a new DNS record for the blog subdomain in the DNS manager of your domain provider, as elaborated in this article.
1 Login and open the Blog page editor. Click on the "Publish" button on the top right.
2 In the sidebar that opens, click on the Publish Type dropdown and choose "Custom Domain".
3 Enter the subdomain name as desired for your blog page. Create a new DNS record for this blog subdomain in the DNS manager of your domain provider. Refer to this article for more details.
4 Click on "Save and Publish".
