ETA app not transferred to new phone

Apps don't transfer from iPhone to iPhone, only the app data along with app links to the App Store gets transferred.

After the transfer is complete (Quick Transfer, iCloud, or iTunes) depending on the internet speed all apps will get downloaded from the App Store automatically. If an App does not exist anymore in the App Store or the iOS version is not compatible with the App then the App data that is transferred cannot be accessed any further.

Apps & Settings --> Apart from the Apps following will also not get transferred.

1. Content from the iTunes and App Stores or PDFs downloaded directly to Apple Books
2. Content synced from iTunes, like imported MP3s or CDs, videos, books, and photos
3. Data already stored in iCloud, like iCloud Photos, iMessages, and text (SMS) and multimedia (MMS) messages
4. Face ID or Touch ID settings
5. Apple Pay information and settings
6. Apple Mail data
7. Apple Music