I know there's a way to bulk edit a bunch of tasks and have them all relate to another task you pick in the bulk action tool bar.

But I'm wanting to select 10 tasks for example, and have a way to make each of those tasks relate to all other tasks in that selection?

Currently, ClickUp does not support directly linking a group of tasks to each other in one action. While you can use the Bulk Action Toolbar to link multiple tasks to a single task, there isn't a built-in feature to create interlinked relationships among all selected tasks in one step.

To achieve this, you would need to manually link each task to the others one by one.