iPhone sharing option only brings up WhatsApp Business

When wanting to open WhatsApp channel from a website on iPhone or wanting to share a picture or link from any app, the only option that comes up in a pop up is WA Business. I have an esim for Business and do not want to use this to share the abovementioned. My personal whatsapp is the preferred and default. Please advise how this can be changed. Why does this happen and why has this been set up as the default. The choice should be the default - as before sharing options to various platforms / apps should be the default. I do not want to get an additional phone for WA Business. Please help / advise!