why C99 'bool' datatype not supported by Matlab/Simulink ?

Looking at the below documentation, I can see that boolean type can be defined as either: int8, uint8 or intn but not 'bool' defined by C99 standard (stdbool.h):

Replace boolean with Specific Integer Data Type - MATLAB & Simulink - MathWorks United Kingdom

What is the rationale/reasons for not being able to redefine it as below ?

typedef bool boolean_T;

Thank you