Is it only the team leader who is responsible for code review?

No, code review should not be performed only by the team leader. An effective practice is the collective responsibility of the entire development team.

Advantages of collective code review:

• Improves code quality through different perspectives and experience.
• Enhances knowledge sharing within the team.
• Reduces the likelihood of errors and bugs.
• Helps newcomers learn and adapt more quickly.

The leader can participate in the review, especially for critical changes, but the main workload should be distributed among all team members.