How to send a reminder in teams as a scheduled message

i’m using teams and i need to set reminders in a channel. I have the application for reminders set in the channel. At the moment i’m using webhooks for sending messages from an external application in this channel, but if i send a message like @remind [“what”] [when], this message is not processed as a command and is viewed like a “text” message. I would ask, is there a method to send reminders in this way? I wouldn’t use MS graph and create an application on Azure. For the reminders i’m using the app published by 88 Ventures Limited. Thanks to all can support me

I’m developing in javascript/PHP and this is the code:

var text= "@remind "Reminder: "+task.trim()+" - "+change.trim()+" from *"+time.substr(0,16)+"* to *"+end.substr(0,16)+"* - "+title+" ```"+descr.replace(/s+$/, '')+"``` at 10:56"";

i’m able to send the message with an ajax request, but in teams i get the message not processed but in “plain text”.