Reminder for a task by minutes and hours

Hi Team,

We are both a support and project management company and I am using a board to schedule all our updates for multiple customers.

We require a notification to be sent to the assigned technician responsible for the update to be reminded 1 hour and then again 15 minutes before the scheduled date/time the update is due to start.

In the reminder automation I can only see an option to select a reminder by days prior to the task. I also see a time option but I don’t want the technician to enter the time manually as this introduce manual errors. This needs to be part of an automation task.

Does something like this already exist. I have read several topics that relate to something similar but I am not sure if this is already available.

Thanks in advance,
Adam