User Yoast Social Links not available in REST API

I have a WPMU environment and I have network enabled the plugin and inserted some social media links into my user:
https://ssws.ca/wp-json/wp/v2/users/1
though the yoast_json_ld dataset is only available via the post API, such as:
https://ssws.ca/wp-json/wp/v2/posts/1705
Is there a specific reason why they don’t appear in the user endpoint itself?
If a user has no posts I can not retrieve its social links via API, only through a PHP function in a template.
Thanks in advance for the clarification or the solution if any at hand.
Giorgio

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