On WhatsApp Business
Open WhatsApp Business and go to Settings, then Business tools, then Business profile. Paste your page address in the Website field. You can add up to two websites.
On a personal account
Personal WhatsApp has no website field. Put your link in your About text instead: open Settings, tap your name, then About.
In status and channels
Share your link in a status update when you post something new, and add it to your channel description so new followers find it.
Use one link
Point every spot to one page that holds all your links. Then you only update one place when something changes.