Enable PIE with a Remote Call function

Hello,

While it’s possible to trigger PIE using Movie Render Executor, (without alt + F8 or from the button), the Editor once the render is finished, exits PIE mode.
We want to keep PIE active after rendering, (no auto exit) and for that it seems that one approach is to start PIE with a remote function call.

But how possible it is, will require modifying the engine etc?

Thank you.