See:
www.xda-developers.com

I was just going to post the same thing, most of my non Samsung chargers won't charge at qc speed, but, interestingly pd chargers charge at 15 watt and ankerp iq2 chargers charge at 14w not sure if this is a unisoc thing or a Samsung non Qualcomm thing.The SM-X200 spec says it will charge at 9V, but took me a while to get that to work. The charger that comes with it only does 5V. I tried one QC 3.0 charger, and also only 5V. Another QC 3.0 charger will charge the SM-X200 at 9V and 1.5A.
Digging deeper, the tablet needs Samsung Active Fast Charge (AFC) 9V. Few chargers support AFC 9V.