Hello @TSOMAS ,
An email's social media buttons bar isn't connected to your actual social media accounts, as those require a full API connection to sync with. The buttons that you insert in an email are essentially just specialty button / image links. Therefore, if you want them to link to a different page, you just need to edit the social bar in the email you're working on, and insert the newer URL for the respective social platform. If you've changed the handle of your account, then its URL will have also likely changed.
For full instructions on adding and editing the social media button bar
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