Many books of the Bible that didn't make it to the official canon(s) and other incredibly important pieces of scripture and literature are only known today because they were preserved in the Ge'ez script in Ethiopia. It is very likely that there are lots of other texts dating to the earliest days of Christianity that are still to be "found", only because there aren't enough international scholars who know the Ge'ez script or work in Ethiopia. There are many, but not as much as it deserves. (Important note is that Ge'ez is both a liturgical language, like Latin, and also is a script, much like Latin or Chinese characters, used by many Ethiopian languages, but others can be written and indeed are written in Ge'ez script, this is why it has preserved such a range of literature)
Ge'ez looks like this:
ሀሎ! ይህ በአማርኛ ቋንቋ እና በግእዝ ፊደል የተጻፈ ነው! ለእርስዎ እና ለቤተሰብዎ በረከቶች!
There was briefly a very bad taste meme calling it a "demon language", with people even copypasting random religious literature in Ge'ez thus making it seem more "sinister". I won't comment on how ignorant and offensive that is.
Ge'ez is an important script and language, much like Greek or Latin, because of its connection to major religions like Christianity, Judaism and Islam. Ethiopia is a wonderful country with a deep, rich history, and is an example of how Africa has always been part of world history. But like all languages, it's also a cultural heritage on its own, worth cherising, preserving, and learning about, regardless of its importance to the rest of the world. Instead of being ignorant for a racist joke, we could always take our time and learn and appreciate such things.
Ge'ez manuscripts. Enoch on the left, and Matthew on the right.