I have the same issue, I was told it's something with OpenGL, Vulkan doesn't have this problem. So if your phone supports it, I'd suggest you switch to Vulkan in the game settings For the 737, do you mean normal cockpit lights that illuminate the cockpit to better see the switches and stuff? That is implemented, the switch is on the overhead panel in the back in the center.
Best wishes
I mean in the passenger compartment. Good to know it doesn't happen on Vulkan, but it drops performance a lot of me. Thanks a lot! The flickering only happens when inside the cockpit