They’re saying it is ض, which is a letter us North Africans generally struggle to differentiate from ظ :) Also, afaik 9 is a ص in many countries, while 8 is a

They’re saying it is ض, which is a letter us North Africans generally struggle to differentiate from ظ :) Also, afaik 9 is a ص in many countries, while 8 is a ق. But it is definitely my first time hearing of a 9 used as ض.