Via Huitong his enhanced version of the so far best image:
View attachment 150550
Provided that the details of the J-XDS from the photo processing is accurate and that the J-XDS has similar length as the J-20 family (~21.2 meters), that means the IWB(s) are about 4.5-4.7 meters long. That's certainly not anywhere close to be significantly longer than the IWBs on the J-20/A/S.
PL-17 certainly will not fit into the IWB(s) of the J-XDS, so I suppose we can put that contention to rest.
In addition, there is definitely no side IWBs present on the J-XDS. So, all we can hope for is for the IWB(s) to be wide enough (to fit more AAMs) and/or deep enough (to double-stack AAMs).