When your WhatsApp Business API send a message to a number, the url in the content might not be clickable like the screenshot attached.
To make it clickable, the User should click the "CONTINUE"/"LANJUT" option, then it will change into screenshot below.
This flow is not needed if your number is verified/has green tick, but it's still advisable to click "CONTINUE"/"LANJUT" because blocking might change the clickability.