Manually running a workflow
When a workflow is configured to run on the workflow_dispatch event, you can run the workflow using the Actions tab on GitHub, GitHub CLI, or the REST API.
Configuring a workflow to run manually
To run a workflow manually, the workflow must be configured to run on the workflow_dispatch event.
To trigger the workflow_dispatch event, your workflow must be in the default branch.
Reference:
https://docs.github.com/en/actions/how-tos/manage-workflow-runs/manually-run-a-workflow