I've seen this issue with myself and other POs in the past, but I can't remember how we fixed it. A story is created and then even when assigned to our team and assigned a sprint it won't show in the backlog.
My suspicion is that it is a status issue set up by the Jira team, where certain status's won't show on the backlog. I work at a larger company so I don't have permissions to check this.
Any idea why a story wouldn't show up in our sprint or backlog at all? How can I fix it so that it would show in the backlog?