Will Apple replace my Macbook Neo because of a tiny Pixel Dot?

Because you purchased your MacBook Neo only about a month ago, it may still be within Apple's applicable Limited Warranty period, which generally covers defects in materials and workmanship when the product is used normally. Apple Hardware Warranties

A small pink dot visible against a black screen may be a stuck pixel, sub-pixel, or another display issue. 

The exact cause cannot be determined from the description alone. 

Apple does not state that a particular number or size of defective pixels automatically qualifies for warranty service, so Apple would need to assess the display.

Because the dot is difficult to see except against a black screen, photograph it before taking the Mac in. Then have Apple or an Apple Authorized Service Provider inspect the display. 

Explain exactly when the dot is visible and that there has been no drop, pressure, cracking, liquid exposure, or other physical damage.

If Apple determines that the issue is covered by the applicable warranty, the remedy may include repair or replacement. 

A replacement is possible, but it is not guaranteed solely because one pixel or sub-pixel appears abnormal.

Apple Mac Service and Repair

We cannot tell you. It sounds like that you might have a warranty issue on hand, but you don't know before Apple inspects your device. I suggest that you make a Genius Bar appointment to find out more

This is what Apple has to say about About LCD display pixel anomalies for Apple products released in 2010 and later - Apple Support.

It describes certain criteria to apply, but Apple may or may not consider it a hardware defect. The final decision will be at their sole discretion.

Ah, there is no warranty issue as it has still 11.5 months warranty left.

I am just worried whether they will be able to find out that pixel spot as I have already submitted the device to Apple.