is IOS 14 available for apple phone 6se

No such thing as an iPhone 6se.

Its either a 6s or an SE. 2 different iPhone models.

Both models can be updated to iOS 14. See here: Update your iPhone, iPad, or iPod touch - Apple Support

https://www.apple.com/ios/ios-14/

There is no such thing as an "iPhone 6se".

iOS 14 is compatible with the iPhone 6s and newer and the iPhone se.

It is NOT compatible with the iPhone 6 or 6 Plus.