Your question is Timeline Conflict With Technical Lead. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
You are driving an important delivery, and a key technical lead tells you the current timeline is not realistic. Leadership is expecting the original date, but the technical lead believes the plan creates quality or delivery risk.
How would you handle a situation where a key technical lead disagrees with the project timeline?