A Taiwan conflict has a good chance of expanding to Korea, where tracked SP howitzers would be useful. In a Taiwan Strait scenario I don't see tube artillery as being that useful on land except against Jinmen/Mazu (which would probably be bypassed) and after landing on Taiwan island itself (where terrain does not favour very heavy vehicles away from roads). Towed artillery might be useful when deployed to inaccessible sites using helicopters.

At sea it might be a different story. PLAN seems to be reverting to 100mm guns on FFGs in the same way that 130mm guns returned to DDGs/DLGs. Once the airspace is secured, PLAN could make good use of naval artillery to not only support landings but also attack targets on the east side of the island (different vectors WRT land-based fires). Otherwise PLAN does not seem to have emphasised shore bombardment in recent years. More than 20 years ago the frigate Jiujiang was refitted with MLRS that could fire a salvo of 250 rockets and probably had at least two sets of reloads, but the rockets were only 122mm so might not have been thought sufficient; PLAN did not refit any more ships with this system and 516 Jiujiang was decommissioned in 2017. It may or may not be wise to revive that idea since currently guided missiles can mostly fill that role, but it would be good to have a ship-to-shore system that can easily coordinate with drones and ground troops to rapidly deliver a large volume of ordinance on very short notice. A 203mm naval gun could do that and use rocket-boosted or base-bleed shells to extend range. Again thinking beyond Taiwan itself - a Taiwan conflict that spirals out of control may force PLAN to land on Okinawa or Guam, beyond the ability of land-based MLRS to support.