Thanks, @Katie_Reynolds!
Yes, @Matt_Macdonald, Flowsana will do exactly what you’re wanting. You just build a template and make all of the tasks that you want to automatically adjust be dependent tasks of the top anchor task. Then each time you create a new project from that template, you put that project under Flowsana control. From that point, any time you change the dates of the anchor task, all of the dependent tasks’ dates will adjust by the same amount of change.
You have two types of workflow to choose from to accomplish this: if you want to set calendar dates for all of the project tasks, you’d use an Auto-Adjust Workflow. If you want to omit calendar dates and instead set durations for how long each task will take, you’d use a Dynamic Duration-Based Workflow.