Public API for user-authorized interaction with a button in another iOS app?

Goal
I am building an iPhone app for a user who has explicitly authorized it. A third-party app on the same device shows a list item with a "Details" button. The content I need is only displayed after that button is pressed. I want my app, in the user's own session and with their consent, to press that button so the detail screen appears.

Constraints
Stock iOS 26 or later, no jailbreak, no Mac or other computer attached during daily use, App Store distribution.

What I have looked at

• XCUITest and WebDriverAgent need a host computer.
• Switch Control, Voice Control, and AssistiveTouch appear to be user-enabled system features. I could not find a public API that lets a third-party app trigger them.
• Shortcuts has no action that taps inside another app.
• App Intents works only when the other app exposes its own intents.

Questions

1. Is there any public, App Store-compatible API on iOS that lets an app, with user authorization, press a button inside another app?
2. If not, is that an intentional platform boundary?
3. Is there any other supported technical architecture for this use case, other than relying on the other app's own App Intents?

Thank you.