What does Jesus mean by saying, 'What is that to thee?'

In John 21:22, when Peter inquires about John’s future, Jesus responds, 'If I will that he tarry till I come, what is that to thee?' This statement serves a dual purpose: it reinforces Christ's authority over His followers and their individual journeys, while also admonishing Peter not to be distracted by the path of others. It emphasizes the sovereignty of Christ in the lives of His sheep, underscoring that each believer is distinctively called to serve and follow Him in their unique circumstances. This command invites Christians to focus on their personal relationship with Christ and obedience to His will, rather than comparison or distraction from others.