Unlike the synoptic gospels, the fourth gospel does not mention the calling of John as an apostle and does not have a list of the 12 apostles. Wouldn’t it be strange if John did write the fourth gospel and did not mention these things? However, if it was Lazarus that wrote it, it would make more sense.
Calling of John as an apostle: Matt 4:18-22, Mark 1:16-21, Luke 5:10-11
List of the apostles: Matt 10:2-4, Mark 3:16-19, Luke 6:14-16
https://debatingchristianity.com/forum/viewtopic.php?p=958782#p958782