Are the duty-free kiosks open after clearing passport control at Suvarnabhumi Airport?

Recent experiences from travelers indicate that duty-free kiosks at Suvarnabhumi Airport may be open after clearing passport control. One traveler noted that they were open last month (June), while another mentioned availability in late April. However, there was a comment noting that no duty-free options were available during a visit in March, and late night travel (3 am) also appears to have limited availability.