There's reasons for these stereotypes to exist, sure, but there are plenty of exceptions. Oh, and obligatory disclaimer: Just because stereotypes exist doesn't mean they apply to everyone. Now, I won't be able to cover every race because some are either too uncommon for there to be a stereotype or are too new to have a stereotype associated with them. Either way, we're gonna be starting with some of the various races in the game.
And yes, before you ask, I did get this idea from YouTuber SoundSmith. This new series is basically gonna go in to the various stereotypes associated with the various race, class, and subclass choices. So I've noticed in my time playing D&D that a player's choices in how they build their character can say a lot about them as a player.