Frankly it doesn't matter what the exact price is. All economics are approximate.
Different story in places like Africa, where you often make a completely different app to contend with things like data caps and slow networks (e.g. Facebook Lite).
That's not true, where are you imagining this from? Hardware certainly doesn't cost the same, at the very least there are different VAT levels, but also pricing is adapted to the local market (literally just checked, i can get an Asus ROG Zephyrus G14 for 300€ less in Bulgaria compared to France). Software I'm unsure how to check, but Netflix costs varies by county.
And there is no such thing as consistent, EU-enforced pricing. Get out of here ...
It sounds like the main North American market is subsidizing the apps being produced and sold worldwide.
Does the same logic apply for other virtual good such as digital music elsewhere?
There's a theory of surplus in economics, which is the extra benefit that someone gets from a transaction above what they would have been willing to pay.
If I buy a game that I would have paid $100 for for $50, then I have a "$50" consumer surplus. One the other end, if the producer was willing to let that game sell as low as $40, then they have a producer surplus.
Profit seeking producers want to capture as much as the surplus as they can, and they do this through price discrimination. You see this in product as two things that are essentially the same but with different marketing etc.,
Price discrimination based on geography is quite effective though as well. People with lower incomes aren't as willing to pay high prices for games. Countries can be effectively segmented based on geography (whether virtually or not), and through this producers can charge a higher price to countries with high incomes (taking away the consumer surplus they would have had vs a lower global optimal price), and still get some value out of consumers in lower income countries.
So it's not that NA is subsidizing the market, so much as it is the company trying to squeeze the most of everyone. Now, you could call it subsidizing in that there are probably products that wouldn't be brought to market without the NA market to pay for them, but that's not really "subsidizing".
I think you'll find that this has been the practice for many decades. A stark example is medicine pricing.
On the same note, why are Levi’s jeans $100 bucks in Europe, but $40 in the USA? They’re probably coming out of the same Asian factory. Not an economist but different value propositions I guess.
Check out this brief description of how software proliferated in Poland during the early years of computers (3:09-8:27): https://youtu.be/ffngZOB1U2A
Yep. Even ad supported apps are subsidized by NA users.
You'd have to use a third party to remedy this but Apple handles it for you.
Apple handling price/international conversions and currency fluctuations seems immensely useful.