Barron Trump manages his father's website called "Truth Social". Barron Trump therefore is the custodian of everything that is written by Donald or otherwise contributed to that site by others. He keeps the good stuff that serves the MAGA-movement and he deletes the bad stuff which undermines his father's efforts.
Everything that allegedly is written by Donald himself in 'Truth Social' is actually written by Barron on behalf of his father. Examples of this have been noted where Donald is videod playing golf at a specific time, while at the exact same time posts have been made onto Truth Social by Donald Trump himself, when in fact he was actually swinging a club at the time of it's posting.
Barron is not necessarily a 'rogue' poster on Truth Social, but he does post his father's thoughts and prayers whenever he is given instructions to do so. That said, Barron is far more conversant with the English language than is his father, which is very telling anytime Donald himself attempts to write a post on Truth Social. Their respective writing styles and conveyed personalities on Truth Social are very different from each other, which only shows that Barron appears to be more intelligent than his father.