### Godot version

4.0 beta 17

### System information

Windows 10

### Issue description

MultiMeshInstance2D is not displaying anything in renderer `gl_compatibility` (GLES3)
Works as expected with `forward_plus` 

### Steps to reproduce

Create a project with renderer `gl_compatibility`
Add a MultiMeshInstance2D


### Minimal reproduction project


[Multimeshinstance2d.zip](https://github.com/godotengine/godot/files/10578720/Multimeshinstance2d.zip)

state.current_batch_index = 0;
		state.canvas_instance_batches.clear();
		return;
	}
	
	glBindBuffer(GL_ARRAY_BUFFER, state.canvas_instance_data_buffers[state.current_data_buffer_index].instance_buffers[state.current_instance_buffer_index]);
#ifdef WEB_ENABLED
	glBufferSubData(GL_ARRAY_BUFFER, state.last_item_index * sizeof(InstanceData), sizeof(InstanceData) * index, state.instance_data_array);
#else
	
	void *buffer = glMapBufferRange(GL_ARRAY_BUFFER, state.last_item_index * sizeof(InstanceData), index * sizeof(InstanceData), GL_MAP_WRITE_BIT | GL_MAP_UNSYNCHRONIZED_BIT);
	memcpy(buffer, state.instance_data_array, index * sizeof(InstanceData));
	glUnmapBuffer(GL_ARRAY_BUFFER);
#endif
	glDisable(GL_SCISSOR_TEST);
	current_clip = nullptr;
	GLES3::CanvasShaderData::BlendMode last_blend_mode = GLES3::CanvasShaderData::BLEND_MODE_MIX;
	state.current_tex = RID();
	for (uint32_t i = 0; i <= state.current_batch_index; i++) {
		
		if (current_clip != state.canvas_instance_batches[i].clip) {
			current_clip = state.canvas_instance_batches[i].clip;
			if (current_clip) {
				glEnable(GL_SCISSOR_TEST);
				glScissor(current_clip->final_clip_rect.position.x, current_clip->final_clip_rect.position.y, current_clip->final_clip_rect.size.x, current_clip->final_clip_rect.size.y);
			} else {
				glDisable(GL_SCISSOR_TEST);
			}
		}