Fortnite acc on ps4, xbox and pc?

My epic is linked to ps4 and xbox. Can play on both accs at any time. Can you be banned for it? And can I also link it to a pc acc?

You can connect your Epic account to up to 3 devices at the same time. You can play on one of these accounts. If you would theoretically share your account with other people, i.e. You both play at the same time, then this is against the Epic terms and conditions.

Then, and actually only then, can you be banned. From experience I can say that because I play on the laptop, but also have Epic open on the server. At the same time, 2 Epic apps are also running on my phone.