As a music producer, should I post on every social media? Is it worth posting the same content on different social channels?

From the previous question of Timothy

Scheduling, publishing, and analytics on social media

Opinion on Telegram channels from the marketing point of view, and comparison with Facebook pages in numbers

What’s the best way to reach out to some artists to ask for a collab or a remix? Should I seek out their private accounts to get a more personal talk or you’d suggest using official contact via their managers

Can social media replace a personal website for a musician? It looks like the majority of producers prefer to have a Facebook page rather than a website

I don’t know how to promote my music. This might be an obvious question, but what is the right strategy to do that?