sappy150, I'm in a similar situation as you, L1A + L2 + L2 EAD filed concurrently at California service center in May. L1A was approved back in July but L2 and L2EAD are still pending.
Did the L2 I-539 and the L2 EAD I-765 get approved at the same time? I'm wondering if we need to wait for the L2 to get approved, and then wait more for the EAD. Crazy that they don't approve all three at the same time!