Don't Know WooCommerce doesn't have this option of shipping phone by default , yaa but like any other field we can enable this using a simple snippet , You can use this when needed.
How to add this snippet?
You can add this snippet to your child themes functions.php , We don't recommend adding code to your main theme if its not developed by you. Otherwise you can use a simple plugin https://wordpress.org/plugins/code-snippets/
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