How to Ghost write LinkedIn Posts?

I have some prior experience in copywriting and cold outreach. although this doesn't directly speak to the fact I should Ghostwrite, I still need to do it to build an audience for the person I am outreaching for.
YouTube doesn't give any proper way to do it, other than: Practice, read different styles of writing, and try to write like that. If anyone has some experience in Ghostwriting LinkedIn posts please share what has worked for you.