Hi @FanaHOVA! That’s correct: plain rebuilds aren’t currently available on builds that are part of a Workflow. (See this post for a bit more detail: https://discuss.circleci.com/t/rebuild-workflow-button-in-build/17807/2)
The salient part is this:
We have plans to add “Rerun Workflow” button on the jobs (build) page. For now, you would have to navigate to the “Workflows” page to rerun a Workflow or rerun a Workflow from failed jobs.