Drupal appears to cache the contextual links inside the browser's session storage.
So in order to pick it up for existing content, you'll need to manually clear out the session storage so it can be refetched.
Just installed the module and went to look for the manage attributes contextual link for the block in layout builder. Could not find the link even after rebuilding cache. I needed to delete all existing blocks (before the module was installed) and add the blocks again to layout builder for the "manage attributes" link to show up in the contextual link menu. Not sure if this is a bug or works as intended.
Closed: works as designed
1.1
User interface
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It's likely this issue predates Contrib.social: some issue and comment data are missing.
Drupal appears to cache the contextual links inside the browser's session storage.
So in order to pick it up for existing content, you'll need to manually clear out the session storage so it can be refetched.