Was Paul the last apostle?
Paul was not the last apostle. The context states that other apostles followed in his footsteps during the apostolic age. The mystery of Gentile joint-heirship was revealed to holy apostles and prophets, confirming that apostolic ministry continued beyond Paul. This indicates Paul was not the final apostle.
Les explains that Paul was not the last apostle; there were others who followed in his footsteps during the apostolic age. In Ephesians 3, Paul writes as a prisoner of Jesus Christ for the Gentiles, describing the dispensation of the grace of God given to him and the mystery made known by revelation. That mystery was now revealed unto holy apostles and prophets: Gentiles would become fellow heirs and joint heirs with Christ in the Body of Christ, a promise Israel never had. So apostolic ministry continued beyond Paul.