I disagree with the final outcome that's just in private. If it's an open brainstorm to decide on solution, you don't have time to book the secret 1 to 1.

I think it's just respecting hierarchy, disagree, raise your concerns, if your boss overrules just accept it, you made your concerns known, they and the team heard of you, if they proceed anyways they accept the risk.

No point in forcing yourself to be the shot caller when it's not your job or responsibility to make the final decision.

Accepting the team consensus and respecting hierarchy is part of the game, unless you are a business owner, you are paid to do as told as an expert give your opinion. Nothing more you can do beyond that.