Yes, since September 2021, WhatsApp allowed businesses to send WhatsApp promotional messages. Businesses can send promotional messages to Unlimited users with WhatsApp Business API integration.
You can send these messages only to users who've opted-in for receiving WhatsApp notifications from your business.
Here's How to Create A WhatsApp Marketing Campaigns
Step 1: Login to Maqsam using your Username and Password.
Step 2: Navigate to Phonebook
Step 3: Click Lists and click + New List
Step 4: Add List Name and select Contacts to be added to the lists and click Save
Step 5: Navigate back to Whatsapp and click on New Conversation.
Step 6: Select the number to send From.
Step 7: Make Sure to set the Recipient to Lists and select the name of the list you want to send the campaign to.
Step 8: Select the template you would like to send.