Да, выражение "So much emotions on his face" в целом правильно, но более естественным будет сказать "There are so many emotions on his face" или "His face is full of emotions".
Да, выражение "So much emotions on his face" в целом правильно, но более естественным будет сказать "There are so many emotions on his face" или "His face is full of emotions".