Screengrab from bluesky user privacy settings. There is a toggle that "discourages" logged out users from seeing an account's posts.
https://mastodon.sdf.org/system/media_attachments/files/113/148/328/743/546/975/original/c17342f587a798a2.png
@philsplace
There is a per-user privacy setting at bluesky that you may be falling foul of.
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