2. The prices were mentioned in the comment you're responding to.
I can see prices for in-app purchases in the iOS App Store.
The only way to see them - from my experience which I just verified - is to go into the app and go into the relevant menu's of the apps.
Please explain where you're able to see this information on the app store on iOS or iPadOS
https://back.ww-cdn.com/superstatic/docs-res/41269/in-appfin...
/Edit: found it! that is way too hidden - Would never have found that without your explicit mention and gif link!
After exploring some more on the play store too, There is actually a similar UI in the app details there too, it doesn't list all items but the price range (cheapest item to most expensive item). Definitely worse then having all items listed, but both could be improved imo by listing them as repeatable purchases, temporary licenses, forever unlocked etc) for informed consent before install. I'd never install any app which has repeatable transactions for example