I came across this question that I had never heard before.
At the beginning of 1 Corinthians 15, we have the famous and ancient Creed of the early Christian church, however, some argue that due to the use of the word "ὁράω + (dative)", we cannot know whether Paul, when writing this creed, was giving a physical or spiritual heavenly appearance account, because the report is "ambiguous", and if it were a physical appearance, this would be against the teachings of the Pharisees (of which Paul was part), In addition, some church fathers (such as Irenaeus of Lion) report that there were other traditions, which interpreted this passage as a spiritual celestial appearance, reinforcing the idea that this report was either ambiguous or implied a spiritual celestial appearance.
1 Corinthians 15:4-7 KJV
4 And that he was buried, and that he rose again the third day according to the scriptures: 5 And that he was seen of Cephas, then of the twelve: 6 After that, he was seen of above five hundred brethren at once; of whom the greater part remain unto this present, but some are fallen asleep. 7 After that, he was seen of James; then of all the apostles.