What furniture is there in your bedroom?
In my bedroom there is a bed, four pillows, an armchair, a duvet, a bedside table and a television.
In my bedroom, there is a bed, four pillows, an armchair, a duvet, a bedside table, and a television.
Note that is/are is agreeing with the singular bed. If the sentence was constructed, differently, you would use "are"
In my bedroom there are four pillows, a bed, ... etc