Hey there,
just make a fork of face_recognition and change dlib requiment in setup.py to → dlib-bin 
Then go ahead and tell streamlit to use your fork in your requirements.txt like this
face_recognition @ git+https://github.com/thetoby9944/face_recognition
This will make sure face_recognition is using the precompiled dlib library instead of trying to compile itself.
That way the face_recognition is working for me on streamlit cloud. 
Hope i could help