Wikidata carries five separate items for John — the apostle, the evangelist, the beloved disciple, the presbyter and the seer of Patmos — linked to one another by P460, and this dataset keeps all five rather than merging them. That is not indecision. The question is genuinely open and it is very old. Papias, writing around 130 and quoted by Eusebius, lists his sources in an order that names John twice: once among the apostles and once, separately, as 'the presbyter John' still living. Eusebius seizes on it, and adds that two tombs at Ephesus were shown in his own day and both were called John's. Dionysius of Alexandria went further in the third century and argued from vocabulary, grammar and style that whoever wrote the Apocalypse did not write the gospel — which is source criticism three hundred years into the church's life and sixteen hundred before the discipline had a name. The tradition answers by identifying all five; most modern scholarship separates at least the seer from the evangelist; and the pages here show the cluster and let the reader see the seam. Where an event or a work could belong to more than one of them it hangs on the apostle, because that is who the calendars commemorate, and each such row says so.
Ecclesiastical History · HE 3.39 and 7.25