Apply Workflow to an Activity - Primavera Cloud

New to Primavera Cloud...

I would like to apply a Workflow to Activities (activities as the object context, opposed to a project or proposal etc...). Reason being, is that we have multiple large projects, which include approx 100 activities, with each activity having multiple tasks - generally a repeatable process of tasks across almost all activities.

I know i can create 100s of ativities and create tasks applicable to each activity - and then copy these tasks to all 100 activities. BUT - if, I in the future update this repeatable process (tasks below an activity)... I would then have to copy this chain of tasks and again, apply to all activities.