What is the meaning of John 21:20?

* The two F.O.G. Bibles & Commentary below are currently a work in progress.

Peter turned and saw the disciple whom Jesus loved following them. He was the one who had leaned back against Jesus at the supper to ask, “Lord, who is going to betray You?”

Berean Standard Bible (BSB)

Then Peter, turning around, saw a disciple following. This was the disciple whom Jesus sincerely loved, the one who had also leaned on Jesus’ breast at the supper and asked, “Lord, who is going to betray You?”

World English Bible (WEB)

Then{G1161} Peter{G4074}, turning about{G1994}{(G5651)}, seeth{G991}{(G5719)} the disciple{G3101} whom{G3739} Jesus{G2424} loved{G25}{(G5707)} following{G190}{(G5723)}; which{G3739} also{G2532} leaned{G377}{(G5627)} on{G1909} his{G846} breast{G4738} at{G1722} supper{G1173}, and{G2532} said{G2036}{(G5627)}, Lord{G2962}, which{G5101} is he{G2076}{(G5748)} that betrayeth{G3860}{(G5723)} thee{G4571}?

Strong's King James

(20) Peter turned back (repented), sees the disciple who loved Yeshua who also leaned back on His chest at the supper and said, "Adonai, who is handing You over?"

The F.O.G*

[20] Peter turned and saw John, the disciple Jesus loved, following them. This was the one who had leaned back against Jesus at the supper and asked, "Lord, who is going to betray You?"

The F.O.G Paraphrase

And Peter having turned about doth see the disciple whom Jesus was loving following, (who also reclined in the supper on his breast, and said, ‘Sir, who is he who is delivering thee up?’)

Young's Literal Translation