The Nathanael Jesus is speaking to in John 1:45-51 is called Bartholomew in Matthew 10:3, Mark 3:18 and Luke 6:14.
Yes Bartholomew did see the heaven open and angels ascending and descending upon the Son of man in the Gospel according to Bartholomew verses 6 - 9
"And Bartholomew said: Lord, when thou wentest to be hanged upon the cross, I followed thee afar off and saw thee hung upon the cross, and the angels coming down from heaven and worshipping thee. And when there came darkness,
I beheld, and I saw thee that thou wast vanished away from the cross and I heard only a voice in the parts under the earth, and great wailing and gnashing of teeth on a sudden. Tell me, Lord, whither wentest thou from the cross?"
And Jesus answered and said: "Blessed art thou, Bartholomew, my beloved, because thou sawest this mystery, and now will I tell thee all things whatsoever thou askest me.
For when I vanished away from the cross, then went I down into Hades that I might bring up Adam and all them that were with him, according to the supplication of Michael the archangel."
I plead that every Christian would read the entire gospel according to Bartholomew!