Based on the location, the image variations are stuck at certain stereotypes

Let's compare results. Run this prompt "two young people in Dubai walking and holding hands, one woman, one man" and upload your results. Mine are attached. I'm in California, USA.

Under the content section on the right side of the Firefly screen, be sure to select "Photo" rather than "Art" to avoid getting these cartoonish looking characters.

Interesting. I'm located in Dubai (Middle East) and here is what I got…

Frankly, if I lived elsewhere (other than USA, which we know is a huge melting pot anyway), such as Asia or Africa, I would be annoyed if I requested images of , say, "two college aged students walking and holding hands", and I always got blonde-haired white people!

It is not just people, but also objects (like flags) that are influenced by where it thinks you are located, as is referenced in this post: P: Union Jack appearing in images - Adobe Community - 14211823

As Jill said, it is using where it thinks you are located because it thinks you will want people and things that appear to be from where you are. I would be nice to be able to turn that behaviour off. The best work around now is to specify regions, locations, races, or cultures in your prompts. 

I think you're correct in that Firefly assumes you want people to look like those in your part of the world. I'm in California, USA and when I requested "two people talking" I got 2 vaguely Hispanic-looking dark-haired people. When I asked for "two modern people talking", I got slightly younger Hispanic people. You have to be much more specific in terms of the appearance of the people. I requested "Two blonde American people talking, one man, one woman" and got young couples that look like Caucasian college students.