For the last 3+ years, Samsung has offered a feature in almost all of their stock Android phones called Dual Messenger, which let's you install a second WhatsApp or Telegram app. (The 2nd app would have a tiny icon overlay marker to differentiate for the user)
Could GrapheneOS implement this handy feature?
I am aware of workarounds such as using a completely new user profile, which is an inferior solution as any WhatsApp installed in a non-running user profile usually has huge delays in receiving messages(sometimes the delay is until you completely re-activate the user profile)
I am also aware of work profiles, this is another inferior solution as it requires installation of a work profile manager app like shelter, or adb cmds via a computer.