Let’s say I create one sunbeam and I want to replicate it by 10 degree intervals with the centre point in the centre of the Sun.
On iPad, while in rotation mode, I can tap the screen with a second finger and that will force 45 degree snap function, but there is really no way to specify a specific number of degrees.
Select both objects, group them, tap copy, tap paste. You now have a duplicate group sitting on top of the original. DO NOT use the orange handle to rotate the group you just copied because it is not very accurate. Instead, tap the rotation dial in the right panel, enter 10 manually and press the enter button.