Send to WhatsApp up to 100

to the experts, I created an application that sends messages from the application to WhatsApp, but I face a problem when I send the message, it opens WhatsApp and tells me that I send the message, it did not send it automatically. This problem occurs when I send to 100 people, I will have to click on WhatsApp 100 times in order for the messages to arrive. Is there a solution to this Problem

As far as I know, WhatsApp does not offer an API... therefore sending something automatically does not seem to be possible... I might be wrong... did you already check the extensions? You could do a search here App Inventor Extensions | Pura Vida Apps
Let us know what you find out...