When importing projects into Jenkins X we use git branch patterns to determine which branch names are automatically setup for CI/CD.
Typically that may default to something like master|PR-.*|feature.*. That means that the master branch, any branch starting with PR- or feature will be scanned to look for a Jenkinsfile to setup the CI/CD pipelines.
You may wish to set this to just .* to work with all branches,.
$ jx import --branches ".*"
Configuring your teams branch patterns
Usually a team uses the same naming conventions for branches so you may wish to configure the branch patterns at a team level so that they will be used by default if anyone in your team runs jx import, jx create spring or jx create quickstart.