[OpenGL ES 3.2] Using GL_COLOR_ATTACHMENT4/5 as drawbuffers being considered invalid?

[GamingCity]

Hi,
i want to ask about this because maybe it is a bug in every GLES driver and wrapper that exist or something is missing.

Working on porting a OpenGL 3.2 core game to OpenGL ES 3.2, it already works, im having one feature that im having trouble with and thats is deferred lightning.

For that attachments 4 and 5 are used. For example:

glReadBuffer(GL_COLOR_ATTACHMENT0);
GLenum buffers[] = { GL_COLOR_ATTACHMENT5 };
glDrawBuffers(1, buffers);
glBlitFramebuffer(0, 0, gr_screen.max_w, gr_screen.max_h, 0, 0, gr_screen.max_w, gr_screen.max_h, GL_COLOR_BUFFER_BIT, GL_NEAREST);

While this work on OpenGL core, on ES does not work, and the error is generally this one.

OpenGL Debug: Source:OpenGL Type:Error ID:1 Severity:High Message:GL_INVALID_OPERATION in glDrawBuffers(unsupported buffer GL_COLOR_ATTACHMENT5)
OpenGL Debug: Source:OpenGL Type:Error ID:1 Severity:High Message:GL_INVALID_OPERATION in glBlitFramebuffer(source and destination color buffer cannot be the same)

I saw this error on zink gles wrapper, libmali driver, mesa panfrost and the adreno 22 driver for android, what is the best GLES driver i saw so far.

angle wrapper gives a similar error but in the end its the same.
OpenGL Debug: Source:OpenGL Type:Error ID:1282 Severity:High Message:glDrawBuffers: Ith value does not match COLOR_ATTACHMENTi or NONE.
OpenGL Debug: Source:OpenGL Type:Error ID:1282 Severity:High Message:glBlitFramebuffer: Blit feedback loop: the read and draw framebuffers are the same.

I check on all cases GL_MAX_COLOR_ATTACHMENTS and GL_MAX_DRAW_BUFFERS is 8 so i dont get it. So all drivers are broken with only having 4 functional drawbuffers (the min for ES 3.2) and they are all missreporting GL_MAX_COLOR_ATTACHMENTS and GL_MAX_DRAW_BUFFERS, or, maybe they need to be enabled and its not present or i missed in the documentation?

Any assistance or guidance on this matter will be appreciated.