I have found a useful "loophole" by buying an punting SIM card to get a new number to call from. However, I keep this SIM tucked away but registered the number on WhatsApp.
On my Samsung s9 main phone, there is a secure folder that is password / fingerprint protected. You can host apps in here which are seperate from your main apps so I have a second WhatsApp with my alternative punting number on there.
As most service providers use WhatsApp, it generally means I can communicate without needing 2 phones, 2 Sims, etc.