Same. I've claimed it on the Prime Gaming site (has "Already Claimed" on the tile), but it does not show up on the Bungie site's "Partner Rewards" page. I have un-/relinked my Twitch account in Bungie's "Account Linking" page, but the only option related to "Prime Gaming" is under "Authorized Applications"; I have 2 entries for "Prime Gaming" and both have "Revoked" under the entry, and neither of the "Unlink" buttons for the associated entry do anything.