I hope this is an appropriate question. I can't think of any group more equipped to answer it, and it's not one I've had much luck answering on my own.
I've become interested in maps - specifically maps from before many modern conventions took over (e.g. putting north at the top, using specific projections, etc). I like seeing the different ways of representing geography that have existed. But so far almost all of the early maps I've found are from Europe. I've found a few from outside of Europe, but only a few. IIRC they are all on this Wikipedia article on early world maps.
So that makes me wonder: Why? I can think of some possible answers:
Europe was just uniquely into making maps
European maps were more likely to be preserved
Bias in the sources - maps from elsewhere exist but aren't covered
Some combination of the above
But I don't know, so I'm asking you.
Are there no Ancient Egyptian maps of the world - or of the region the mapmakers inhabited? Indian maps? Mayan or Aztec maps? Malaysian maps?
The simple answer is "some combination of the above," with a dash of "it depends where you look."
You're correct that there's bias in some of the sources, like which maps get photographed and posted on wikipedia. And which maps historians research. European maps get a lot more attention from scholars, just like European history gets more attention than other areas. On top of that, the issue of preservation is important. Marshallese stick charts definitely don't last centuries. Which brings up another point: maps from non-European cultures sometimes get labeled as "not maps" because they don't look like European maps, which dominate our modern view of what defines a map. The stick charts or Lukusa memory boards, which act as maps, are good examples. But that only explains part of your question.
There's also some truth to the idea that Europe was really into maps – at least at one particular defining moment. From the 8th through 15th century, Europeans produced about 1,500 maps total, on the entire continent. By 1600, there were at least 1.3 million maps in Europe. The advent of printing plus Europe's age of discovery lined up to create a booming market for maps, a thousand-fold increase over map production in medieval Europe. So, yes, Europe was really into making, buying, and preserving maps just before mapping conventions became standardized. Which is one of the reasons our current conventions exist – they're based on "rules" created during Europe's cartographic revolution.
If you want to learn more about ancient Egyptian maps, Indian maps, Mayan and Aztec maps, and Malaysian maps, definitely check out the voluminous History of Cartography series from the University of Chicago Press. Volume Two is a three-book series with dozens of scholarly articles on mapmaking in premodern Islamic and South Asian societies, East and Southeast Asian societies, and African, American, Arctic, Australian, and Pacific societies. And, even better, it's all available online for free!