MSFS uses what’s called “screen-space reflections” plus a very low-resolution environment map. This means that only portions of the scene that were rendered in the previous frame are available to reflect from with decent resolution – hence seeing only portions of the engine that are visible, and not any of the portions that are around the bend. (It also excludes a lot of area around the edge of the frame.)
Until they add ray tracing support there won’t be good, complete reflections. Many folks say this will never happen because it will be too expensive in terms of render time. We’ll see!
Here’s hoping for MSFS 2024. 
Wishlist item for ray tracing: