If you want to group your services, escalation policies or on call schedules, you can do so using the Teams feature, or by using a standardized naming scheme (i.e. a standardized prefix). The example below shows a set of services using ops_ and prod_ as the prefixes.
You can quickly sift through your services, escalation policies and on-call schedules by searching for the desired prefix (shown below). The example shows services, but escalation policies and on-call schedules have a similar search function.