It is generally not advisable to place a sofa facing the stairwell for the following reasons:
1 The sofa is for leisure. If there are people on the stairs, there will be loud noise, which will affect leisure time. .
2 The sofa is a place for entertaining guests. If there are people going up and down the stairs, it will affect the communication between the guests and the host.
3 Stairways are often also air vents, which are not conducive to people on the sofa resting or communicating.
If the sofa must be facing the stairwell, it can be separated by a partition.