I am using the WhatsApp Click-to-Chat feature to start a chat with a given number and a prefilled message. According to the WhatsApp FAQ, the link format is as follows:

Using WaBM, WhatsApp marketing tool, can significantly enhance your business by streamlining communication and boosting customer engagement. WaBM allows you to automate messages, manage customer interactions, and deliver personalized content effortlessly. This tool ensures that your marketing campaigns are timely and effective, leading to higher customer satisfaction and increased conversion rates. With its user-friendly interface and powerful features, WaBM helps you reach a wider audience, maintain consistent communication, and ultimately drive business growth.

how to send me a WhatsApp message from the web like… wa . me / myphone without using the phone number using a wildcard..
The idea is to be able to create a demo of services, so you can simulate a request from a client and receive it, without having to configure or enter a number.