HMAC DRBG SHA-256 Port to 24-bit Native Types

I have a project where we need to run the HMAC DRBG code in an environment where the native type is only a 24-bit uint. This looks possible in general until I get to the SHA-256 code which it depends on, which is heavily reliant on 32-bit operations. Is anyone aware of how to address this section of it?

I believe I will need to modify at least these files for the code path that this needs to support:
Parts of entropy.c
Parts of md.c

Mbed TLS is designed to support architectures used by Arm( 32 bit and 62 bit architectures ). It is reasonable that 24 bit might have issues, as it wasn’t tested.
I can suggest you have some type \ Macro in your platform to handle the 32 bit types as a struct of two 24 bit types, and do the calculations to use 32 bits out of them. Does that make sense?