No.
My very limited understanding is that you can have different accounts on different instances, with the same name.
E.g. sicjoke@lemmy.world and sicjoke@lemmy.social
Much like you can have different email accounts on different email platforms, with the same name.
E.g sicjoke@gmail.com and sicjoke@hotmail.com
Anyone feel free to tell me I am talking bollocks.
My choice of app is entirely based on what the contact uses.
Most of my family are on iOS so we use native iMessage and FaceTime.
I have a small group of friends that almost exclusively use discord.
Older non-iOS friends tend to use WhatsApp, younger ones Telegram.