Start Pipeline does not provide the user with a way to set the serviceAccount of the PipelineRun

The Pipelines UI allows the user to manually trigger a pipeline. But, it does not have a field for setting the serviceAccount. The window has an Advanced options block in which this field may be added

1. Install the operator "Red Hat OpenShift Pipelines"
2. Create a pipline
3. In the pipeline view click Start

The user can set the pipeline parameters and attach secrets.

The user should have a way to set the serviceAccount