Apple comes to mind. Their products are usually even more expensive in poorer countries.

Just about any commodity would qualify. Oil companies aren’t giving discounts to poorer countries or selling them a cheaper inferior product.

Lots of indie software makers can’t be bothered to put in the effort to target individual countries, and just sell at one price worldwide. I believe both Apple’s and Google’s app stores work this way, with no ability to set a different price in different countries.

You can't compare physical goods to software in relation to price parity. The cost to sell an iPhone in South America is higher for Apple then it is to sell one in the US so it makes sense that they cost more. For a game it costs the same, and costs virtually nothing for each sale.

Google play supports setting different prices by country.

You’re saying, they don’t price discriminate because they can’t.

I’m saying, the fact that they don’t proves that it’s not necessary.

These two statements are perfectly compatible with each other.

Again: I’m not arguing for or against price discrimination. I’m just saying it’s not a need.