The Account Page in Shopify is where customers can log in, view their order history, manage their addresses, and update account details.
After enabling the account option in Header its must also be enabled in Dashboard Panel for visibility
Log in to your Shopify admin panel.
Go to dashboard panel Settings > Customer accounts.
Enable Show login links
The change made will Automatically Save with the popup message ad settings saved
Customers can access the account by "Sign in" or "Log in" link after enabling it in header.
