compile intel libraries for modelsim stand alone

To run the simulation, you have to add library model for that specific family device, ie twentynm library for your case. Find and include necessary precompiled libraries for modelsim in here /quartus/eda/sim_lib/ . My advice is to use nativelink flow to set up the simulation environment for your project. It has self-generated script and is more easier way than manually adding those libraries. Refer to link https://www.intel.com/content/www/us/en/programmable/documentation/gtt1529956823942.html to understand its flow.