Is there an article on how to transfer ALL date from an iphone 11 to a new iphone 12 pro max?

I am not what you mean by "ALL".

All is never transferred in any of the three options given below.

iPhone to iPhone, there are three ways,

1. Quick Transfer --> Use QuickStart to transfer data to a new iPhone, iPad or iPod ...
2. Restore from iCloud Backup --> Restore or set up your device from an iCloud backup - Apple ...
3. Restore from iTunes backup --> Restore your iPhone, iPad, or iPod touch in iTunes on PC ...

Apps don't transfer from iPhone to iPhone, only the app data along with app links to the App Store gets transferred. Stay connected to the internet and continue using the iPhone. Depending on the internet speed all apps will get downloaded from the App Store automatically.

Apart from the above following will also not get transferred.

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