لَكِنَّهُ يَتَّبِعُ مُحَمَّدًا ﷺ
But he will follow Muhammad ﷺ.
After Jesus returns, he is described as judging under the final Prophet's law rather than bringing a fresh, independent dispensation. The continued existence of an earlier prophet does not logically entail a new law or prophetic appointment.
This distinguishes the person who already holds prophethood from the establishment of a new independent legislation. Earlier prophets could have distinct dispensations; the account of Jesus' return instead describes his conformity to the final Messenger's religious law.