iwant to ask ihave iphone 12 pro max is surpport e sim card

The iPhone 12 supports eSIM.....unless....you purchased your phone in China.

eSIM is software. It is not a "card" or hardware.

Note that an eSIM is not a card. It is an electronic SIM that contains the same sort of information that would be on a physical SIM card.

So are you asking whether the iPhone 12 Pro Max supports eSIMs? Or whether it supports physical SIM cards?