خه ريكى is an action that you are telling the listener and it is a precent continuous the perfect fit for that can be “doing

u can use (khariky) when u r doing something right now .. like its happening now.. there is not that different between them.. u cam use them both :)

well done [emoji]

It's used to answer when asked ’خەریكی چی؟’ which is a little different than 'چی ده‌که‌ی؟'. So I will use the question itself to explain the word 'خەریک'. If the question means 'What are you doing right now?', both can be used. In this context, I would usually say 'خه‌ریکی چی؟'. Because 'چی ده‌که‌ی؟' sounds more abrupt; less conversational. It works better if you add something like 'خەریكی چی دەكەی؟'. ‎'ئەوە چی دەكەی؟' is also an option, but this is more negative - something a parent would shout to a child who is breaking something valuable. If the question is 'What do you do for a living/as a hobby?', 'خەریكی چی؟' works again. 'چی دەكەی؟' does not fit well in this context, but, again, it might perhaps work if you add something, such as 'چی دەكەی ئەو دەمانە؟'. ‎'چی دەكەی؟' works fine if the question is 'What will you do/What are you going to do?', as in ' سبەینێ چی دەكەی؟' or 'چی دەكەی ئەگەر من بڕۆم؟'. So, to answer your question, when the question is asked with 'خەریكی', we usually answer with this same word, which usually indicates that the action is in present time and still ongoing.