John Chrysostom

For He did not show Himself to all at the same time, in order that He might sow the seeds of faith. For he who had first seen and was sure, told it to the rest. Afterwards the word going forth prepared the mind of the hearer for the sight, and therefore He appeared first to him who was of all the most worthy and faithful. For He had need of the most faithful soul to first receive this sight, that it might be least disturbed by the unexpected appearance. …

Catena Aurea by Aquinas ↗

Theophylact of Ohrid

During these hours, of course, the Lord also appeared to Simon, while these two men were making their way back to Jerusalem.

Commentary on Luke ↗

Bede

And they got up that very hour, returned to Jerusalem, and found gathered the eleven and those who were with them, saying that the Lord has truly risen and has appeared to Simon. By now, there was a report that Jesus had risen, made by those women, and by Simon Peter to whom He had already appeared. For indeed, these two found them speaking when they arrived in Jerusalem. Therefore, it could be that out of fear they did not want to say on the way that they had heard He had risen, when they only said that the women had seen angels. …

On the Gospel of Luke ↗

Bonaventure

And therefore he adds: And they found the eleven gathered together and those who were with them, saying: The Lord has truly risen and has appeared to Simon; and through this they found them rejoicing, so that it can truly be said: "Behold, how good and how pleasant it is for brethren to dwell together in unity!" For all were partakers of the joy from the apparition which was made to Peter. …

Commentary on Luke, Chapter 24 ↗