Why are there bright spots and colored dots on the POCO X7 Pro screen?

The most common cause for bright spots or colored dots is the protective film that comes pre-applied to the screen. Sometimes, dust or air bubbles can get trapped under the film, causing small spots or imperfections that look like bright areas or colored dots on the screen. Tear off the film to check, if it is a black spot on the protective film, just apply a new film.
Try restarting your phone to see if it clears up any temporary software-related glitches. Some extremely small spots do not affect your use and do not need to be returned or exchanged.