Healthy diet from WHO didn't mention protein

I read and searched "protein" from the healthy diet, but didn't find any. It covered
    - fruit and vegetables, legumes, nuts and whole grains
    - sugar
    - fats
    - salt:  竟然推荐多达5g！！！， 美国医生一般建议2克(如果是钠, 就与5g食盐含钠相当)

https://www.who.int/news-room/fact-sheets/detail/healthy-diet