Upwork does not have the functionality that you are looking for.
There is no option to "re-open a job."
You may duplicate a job.
You may create a job based on a previous job.
You may even continue to pay bonus payments to a freelancer using an ALREADY CLOSED JOB.
But once a job has been closed, you can not re-open it.
Which is fine.
Because there is no particular benefit to either freelancers or clients to being able to re-open an already-closed job.