They don’t use special clothes or titles, nor do they receive veneration from others. There’s no way to identify them or distinguish them from other Christians.
From Paul and Timothy, slaves of Christ Jesus. To all those in Philippi who are God’s people in Christ Jesus, along with your supervisors and servants.
Philippians 1:1 CEB
Even so, the supervisors and servants fulfill a distinct function within the community of Christians, for the proper functioning of the body of Christ. Differently from others, they have specific qualifications (Titus 1; 1 Timothy 3). Their tasks are also well defined.
This is why Paul mentions them in the greeting of his letter to the Philippian Christians. And perhaps also for their role in the decision to send help for his mission of preaching the gospel, an important theme in the letter.
Such ministries, critical for the community, ought to be desired, but not coveted. When all evangelize as they should, there will be men who desire to serve in these functions.
Father, may the church evangelize in order that there may be in its midst men who are faithful and qualified to serve as supervisors and servants, in the humble spirit of Christ. Amen.