Just to confirm, do you have any strikes on your channel? Channels that have more than 2 strikes will not receive access to Stories feature. Keep us posted.
Sorry we missed your tweet. To help the right team better investigate, can you send a feedback report from the device/account having the issue: https://yt.be/help/RYwc ? You may not receive an individual response, but the details will help us identify and fix any issues, thanks.