Meeting SDK | Custom UI

Hi Team - Is there a possibility for a customer to auto send a pop-up or a message in chat or a slide once the meeting starts to all the participants, if they have msdk integration? The client is basically an Edtech client, who wants to send across an auto message to all participants across all batches, every time it starts. Example : How the students can attend follow up, 1:1, doubt sessions etc.

What are the steps to achieve this through a Customer UI?