If you want to get all Jenkins jobs for the chosen repository, you can use the following REST endpoint:
<BB_URL>/rest/jenkins/latest/pipelines/jobs?repositoryId=<REPO_ID>&filter=<FILTERS>&order=<ORDER>
Where:
REPO_ID - the id of your repository for which you want to get jobs
FILTERS - this part must contain all titles of the returned jobs
ORDER - can be name_asc, name_desc, date_asc or date_desc
The response body looks like this:
{ "numInstances": <Number of Jenkins instances for this repo>, "jobs": { "<URL of the first instance>": [ { "jobId": "<Job name>", "instanceId": <Instance id>, "jobUrl": "<Relative path to the job>" }, ... ], ... } }