FlightGear will run on Pi4's.
It uses OpenGL and it is based on OpenSceneGraph and a bunch of other dependencies.
OpenSceneGraph will build for Android too and use OpenGLES.
There is a Cessna in the OpenSceneGraph examples that works, even a version on fire
Linux Air Combat Sim will build and run and then crash
This is based on the GL-117 simulator.
Pi3D had some Python demo code with a Pitts Special.
Those are just the ones I have looked at.
While the Pi4 hardware is OpenGLES3.2 capable, currently the driver software is only around 3.0 with some 3.1 extensions
On Buster it is using the Mesa OpenGL driver.
Older VC4 Pi's are using OpenGLES2.1
Looking at SDL games the UI is normally done by the SDL code but the Graphics is OpenGLxx
Android games will be the closest to OpenGLES but most PC type ones are generally OpenGL.
Depending on your code it might just work.
I have compiled SDL2 code as well.
I'm dancing on Rainbows.
Raspberries are not Apples or Oranges