Follow the steps below to change your Hashnode subdomain from your dashboard.
Step 1: Log into your Hashnode account.
Step 2: Click on your profile picture at the top-right corner of the page on a desktop or mobile screen.
Step 3: Next, click on the Manage your blogs option to access your personal and team blogs.
Step 4: Select the Dashboard of the blog you want to update
Step 5: Click on the Domain tab and update your subdomain from the Hashnode.dev subdomain tab.
Step 6: Click the Update button when you're done.
Step 7: Your subdomain will be updated and your blog will be made available through the new subdomain.