I think engines like Unreal, Unity, and Godot will remain popular with people who are more interested in creating a game than creating a game engine.

> if yes what are the things that raylib is missing that these engines have?

Asset management and import pipelines, rendering pipeline, loads of ready-to-go features like environments, baked lighting and global illumination, AO, reflections, particle systems, input mapping and event propagation, scripting, audio systems, GUI systems, and lots more.

Raylib is a library that you could use to build all that stuff, but otherwise it's a useful library, not a fully-featured game engine.

If you don't want a game engine and know exactly what you features you need and want to build only that, then Raylib is a great option.

If you don't want to write a global illumination system or asset management pipeline but would rather focus on creating gameplay, then a game engine is a good choice.