how to upgrade my Mac mini 2013 to MacOS 11

There is no 2013 Mac Mini. The model year is available at Apple menu > About This Mac.

See the information in Identify your Mac mini model - Apple Support including the follwing:

Mac mini (Late 2012)

Model Identifier: Macmini6,1; Macmini6,2

Part Numbers: MD387xx/A; MD388xx/A, MD389xx/A

Newest compatible operating system: macOS Catalina 10.15.7

and

Mac mini models from 2014 and newer can run the latest version of macOS. For older models, the latest compatible operating system is noted.

Also see: How to get old versions of macOS - Apple Support

and

How to upgrade to macOS Monterey - Apple Support

nuryfromnm wrote:

I checked the model it is “late 2013”

That's strange -- Apple doesn't seem to be aware of that model -- see: Identify your Mac mini model - Apple Support