More optimistically, there's been displays of export missiles that seem adapted for the J-20's bays. They're only export missiles, and may not have been inducted into the J-20, but it shows that there is research into A2G bombs for the J-20.
As I've shown, the J-20's bays are deep enough to, unlike the F-22, carry serious stand-off strike missiles along the lines of what's seen with the F-35. At 4.5x2x.550m, the J-20 might be competitive with the F-35 in terms of its internal-bay strike capability, with 3-4 strike missiles alongside 2 WVR AAMs compared to 2 stand-off strike missiles with 4 BVR AAMs.
It's still a question of missile availability, of course, as well as to whether the J-20's bays are reinforced to carry such stand-off missiles. For comparison purposes, the F-22 can carry about 1200 kg of munitions in its main bay. The JSM seems to weigh around 400 kg, so it would be 1600 kg for the J-20 to carry 4 JSM-equivalents.
