I don't think that the concepts of 1 Enoch are true. Maybe some small details are. Such as any mention of Noah, or God sending the flood. But other parts I would say are clearly just not true in any historical sense. Especially not the parts involving man eating giants. Why? Because there's no archaeological evidence for such things. The giant nephelim in Enoch are described as being something like 300 feet tall and they ate people. We find giant dinosaur bones, but there's no evidence for people that large in history (contrary to AI generated fake images).
However, that doesn't mean that the text isn't relevant to Bible study.
Fragments of Enoch have been found among the caves of qumran, among the dead sea scrolls. Which were caves in which early Jews preserved scripture at least a century or two before the new testament authors were ever born. These are texts that the new testament authors quote quite frequently. But right there along manuscripts of Psalms and Genesis and Daniel etc. there were other books that didn't make it into the Bible. Enoch, Jubilees, Book of the Giants. Etc. Genesis apocrypha is another.
Youd have to investigate the dead sea scrolls to see the various ways that the pots and scroll fragments were dated. But they typically are written in languages that predate the new testament authors. In dialects of Hebrew that predate Hebrew known at the time of the authors. Aside from typical archaeological studies.
The dead sea scrolls include much of the oldest manuscripts of the Bible that we have. But it just so happens that some apocrypha is there alongside the Bible.
And some early church fathers, Irenaeus and Tertulian, some argued for the canonicity of these texts. So that's something to be aware of too. And in Ethiopia it was considered canon by a church there.
But Enoch is just scratching the surface. There's a lot to see among extrabiblical texts.
There has been a later addition to 1 Enoch that involves a conclusion to the flood story though. It dates to after the new testament authors. In which the nephelim battle leviathan (during the flood) and are slain by, I believe it is the archangel Micheal. Which completes God's judgement. Like a side story to Noah's ark.
It's not canon, it's not inspired. Some of it is certainly false. But it gives insight into concepts that were circulating in the society of the new testament authors. When they were walking around preaching and sharing the gospel, people would have known some of these stories. Not just Genesis, but about angels rebelling and God responding with the flood. And so Peter and Jude reference these topics.
Jude 1:6-7 ESV
[6] And the angels who did not stay within their own position of authority, but left their proper dwelling, he has kept in eternal chains under gloomy darkness until the judgment of the great day— [7] just as Sodom and Gomorrah and the surrounding cities, which likewise indulged in sexual immorality and pursued unnatural desire, serve as an example by undergoing a punishment of eternal fire.
2 Peter 2:4-6 ESV
[4] For if God did not spare angels when they sinned, but cast them into hell and committed them to chains of gloomy darkness to be kept until the judgment; [5] if he did not spare the ancient world, but preserved Noah, a herald of righteousness, with seven others, when he brought a flood upon the world of the ungodly; [6] if by turning the cities of Sodom and Gomorrah to ashes he condemned them to extinction, making them an example of what is going to happen to the ungodly;
They're talking about stories that people would have known about. Their audience would have known the references.
And a lot of the new testament is build up around old testament narratives. So even reading pagan texts, though they include false information, can give someone insight into what the world was like back then.
Reading ancient Egyptian pagan literature. It sounds strange. It isn't inspired, it's pagan. It's incorrect.
And yet, what did Moses have to deal with when the isrealites were struggling with the worship of Egyptian gods? By studying ancient pagan literature, even though it isn't true, we can learn about what Moses and Jacob and David etc. We can get some insight into what the world was like back then. What were people talking about and why were the Biblical authors so concerned about these other religions. And what ideas did Moses and others share with the wider ancient near east?
And I think most people would be surprised to see some of these things. And you'll never hear it covered in a church sermon. But among Biblical scholarship, it's common to hear it discussed.
Here are some interviews with evangelical Bible scholars that I've appreciated.