[know] where {sb} [stand]

to have an understanding of how one is viewed or valued by another person

The idiom "know where someone stands" likely originates from the idea of having a clear and defined position or status in a particular situation, relationship, or interaction. It is used to signify having a comprehensive understanding of how one is perceived, valued, or regarded by another person.

After the candid conversation with the supervisor, Sarah knew exactly where she stood in terms of her performance and potential for advancement.
Having discussed their feelings openly, Mark and Jane now knew where they stood in their relationship, providing a foundation for future decisions.
The employee sought feedback from the manager to know where they stood regarding their contributions to the team.
Following the team meeting, everyone knew where they stood on the new project, clarifying roles and expectations.
The negotiation concluded with both parties understanding where they stood in terms of the agreement, fostering a sense of mutual clarity.