The mentioned MATLAB Answer: https://www.mathworks.com/matlabcentral/answers/446302-how-do-i-update-a-gui-designed-in-app-designer-with-data-from-a-running-simulink-model does include a well defined Answer regarding connecting a App Designer components with a Simulink model's output and displaying it using the Edit TextField component.
However, in recent releases of MATLAb, components specific to Simulink simulation and and Simulink Real Time have been introduced. These components can directly be linked to a Simulink model with controls being set from the App Designer app and receiving back output from the Simulink model.
The following referenes can be referred to know about how Simulink models can be integrated with App Designer's workflow using Simulink components:
Hope this helps! Thanks.
