Items Within Item Attribute

How can I Add items like social media icons for each Item Attribute

e.g. Team cards are created using Item Attribute now every team member has social media accounts to be shown under every team member, these members might have different accounts that are not necessarily fixed and some members might have only 1 or 2 or 3 social media accounts… How do we achieve this…

PFA screenshot: https://snipboard.io/BIrR1i.jpg