How long will the iPhone SE 2020 will be supported by Apple

From Apple:

Owners of iPhone, iPad, iPod, Mac, or Apple TV products may obtain service and parts from Apple service providers, including Apple Store locations and Independent Repair Providers, for a minimum of 5 years from when Apple last distributed the product for sale.

Obtaining service for your Apple product after an expired warranty - Apple Support

Note that this does not tell you how long the device will continue getting iOS updates.

Hello alonzo128,

Unfortunately, we cannot answer this question. We are Apple users, just like you, and cannot determine how long Apple will support certain iPhone models. You can make predictions based of past history, but only Apple knows and can determine how long it'll be supported. Please see the below for iPhone models that support iOS 17:

• iOS 17 Preview - Apple