I’m pretty sure this only goes to Apple, not to the actual developer.
I believe I’ve even seen devs specifically ask for copies of the reports from the crash reporter, as they wouldn’t receive them otherwise.
this doesn’t change the rest of your statement though, just afaik the recipient is different.
based on https://help.apple.com/xcode/mac/current/#/deve2819c518 it seems like users may need to explicitly enable sharing crash data with app developers.
I don’t know what the default for this is.
https://help.apple.com/xcode/mac/current/#/dev9a80ab71d seems to imply that you need to distribute your app via app store or testflight to be able to receive crash reports.
the majority of apps installed on my mac are not installed via app store, though many of them have app store variants.
i don’t know if the distribution channel matters or just having the app in app store is enough.
this article however also explicitly states this, so it appears that you do indeed by default not send this data to app developers: