I've mentioned this before but I don't think it's getting seen by a department that can deal with it. I think it may be a Connect issue.
I have localizations in multiple languages. They are all created the same way. In that the images are the same as the default language. I tried to rely on icons rather than text wherever possible to keep language from being a limiting factor.
Since releasing the app, I've tried a few ways to advertise it. One being ASA (Apple Search Ads) Basic. It accepts all my localizations except for Brazil. Even accepts Portugal.
When I email ASA tech support, I get generic sounding replies that are some variation of "add localization for Brazil and then the ads will start running". They do seem to acknowledge the text localization is there but seem to believe the images are not. This despite sending a screen cap. They do not attempt to explain why Brazil needs special treatment from all other localizations or why this isn't indicated in App Store Connect. I assume they are saying that despite the images already being there, I need to copy them to the Brazil localization anyway for some unknown reason. This article indicates Brazil is a new addition to ASA for this year. This makes me suspect it may have a glitch.
I intended to only advertise in a few markets to start. Which didn't include Brazil initially. But ASA Basic isn't spending at all. On second attempt, it did net five downloads the first day and then hasn't had once since. This made me suspect one glitch may be causing another. Or maybe it is unrelated and advertising costs are just insane. Still, I think it's a possible glitch worth investigating.