If you have trouble adding your Bluesky account to Tapestry there are a few things to try:
1) Make sure to use the email address you used for your Bluesky account when you signed up with the service.
2) If you have Two Factor Authentication (2FA) turned on for Bluesky you will need to temporarily disable it. Bluesky's API login doesn't currently support 2FA so Tapestry cannot authorize the account properly with it enabled. Once you've successfully added your Blusesky account to Tapestry, you can re-enable 2FA.
3) When adding a Bluesky feed (or any new feed) via the Feed Finder in Settings, always make sure you tap Save at the end of the process or it won't be added to your feeds.