Managers will usually pull 400k+, I wouldn't say that's a top 5% salary. Above 300k isn't unusual at all. Check out levels.fyi for some examples of top-of-band salaries in each level.
Engineering managers?
Are there any non tech management level positions at FAANG that net these types of salaries as well?
Are you saying some of the people here with 400-800k salaries are top 5% at a FAANG?