Maybe a non-popular take, but i think the designers might of got it a tiny bit incorrect for the new corvette and frigate. Since the Ukrane war started, it seems suicide uav boats are the new threat and modern ships should have more GUNs or Hellfire like missiles as part of defending itself and capital ships. The type-54a had 2 ciws reduced to 1 (i assume it can attack sea crafts) and the type-56 had 2 side guns reduce to smaller guns and maybe to non on this ship.
Speaking of CIWS, they aren't limited to just rotary cannon-type ones (Type 1130, Phalanx), but also missile-based ones (HHQ-10, RIM-116), alongside DEW-type (laser, microwave etc) CIWS in the coming years.
For the Hellfire-like missiles - The PLAN has the HHQ-10.
In the meantime, I believe there are good reasons as to why the 056/A FFLs aren't equipped with Type 730 CIWS - One of which I believe is cost, given how the 056/A FFLs were meant to be procured cheaply, rapidly and in large numbers (and the onboard armaments actually do cost a significant portion of a warship's price tag). Besides, there's the H-PJ/26 76mm fully-automatic gun, two H-PJ/17 30mm remote-controlled autocannons, alongside two more QJZ-89 heavy machine guns. I suppose that's sufficient close-range and point-blank armament for a 1440-ton warship.
Meanwhile, for the 054A FFGs - Having a Type 730 or Type 1130 on both sides of the FFG should be packing enough firepower against surface targets at point-blank ranges. Needless to say, there're also heavy machine guns stored inside the ship, which can be easily brought onto and mounted on deck when necessary.