Yes, there are. The Stranger Things comics offer additional adventures and backstories that complement the TV series. They provide more depth to the Stranger Things universe.
Stranger Things is not based on a comic. It originated as an idea from the minds of the creators and developed into the popular series we know today. The show has its unique characters and plotlines that aren't adapted from comic material.
Stranger Things is not based on a comic. It was developed independently with its own unique storylines and characters. The creators came up with the idea specifically for the show without drawing inspiration from any existing comic source.