How to disable rendering temporarily?

How to disable, then re-enable rendering? (Blueprint or C++)

It might be equivalent to reduce frame rate to zero if that’s allowed. Would be nice to have a better solution that that, however.

Application should continue to show the last rendered frame until rendering is re-enabled. Input events should continue to work, so application logic can re-enable the rendering on user input.

Goal: Stop rendering while waiting for user input in order to save power on mobile devices. It is especially useful to wait in non-animated menus, options screen, etc.

Hey, have you made any progress with this? I also have the same question