Currently, ClickUp templates do not support automatically adjusting the due dates of subsequent tasks based on the completion or due date of a prior task.
When I create a Folder/List template - right now if I change my template to have a task due "today" and set the next task as due 48 hours (6/5) after that task, when I use the template it will show the tasks due "today" as the day I use the template; however, the task that was set for 48 hours after that will still show "Due 6/5" which will ultimately trigger a past due notice AND I will have to manually change the due date.