I would imagine that accounts of "important" people are handled personally rather than by automated algorithm. As Jack Dorsey points out in this[0] Joe Rogan podcast, the reported tweets by public or algorithm are manually checked at some point.

Approx. 4000 employees of Twitter all around the world. Every day 100k (edit: 100M) tweets are sent. The reports of tweets that violate the platform policy are (reported by public) enter a queue. These are then inspected by personnel hired by Twitter (number varies proportionally to the scale reports in the queue).

The personnel then go through a series of steps to take an action such as making you verify again, delete those tweets, suspending the account, or in the last resort ban the user permanently.

[0] https://www.youtube.com/watch?v=DZCBRHOg3PQ