US (and Israel I guess) is the best at urban land war. It is the more experienced compared to even Russia with their involvement in Afghanistan and Chechnya. No one else's experience amounts to that much in comparison... not Turkey's, not Azeri or Armenian, not Iran, Egypt, Iraq, Jordan, Pakistan or India. Listing those who have gone to some level of conflict in more recent decades.
Urban land war would surely be so different to the kinds of land war PLA is no doubt great at if for no other reason than pure size, strength, firepower, logistics, nifty artillery and drones and on and on and on.
PLA seems like it would not be able to use a great deal of its land war strengths in an urban setting without leveling the place. It would just be under-armoured vehicles that would depend a lot on infantry. It's main advantage over some others would be its electronic war, comms, recon, info sharing, and drone technologies but all those may or may not mean that much. No one is good at urban war against insurgents but one can be more experienced and hence understand more lessons from experience - US with Vietnam, Iraq, and Afghanistan. PLA's method for such a scenario may involve a lot of brute forcing and higher tolerance for losses until it learns and adapts IF it adapts. Urban war demands tactical flexibility and Covid lockdown rules implementation reveal how inflexible Chinese leadership is. Will they be able to overcome stubbornness to improve tactics and strategic thinking re urban war methods. US may have been as well but I suspect they are a bit less rigid with the textbook rules than Chinese military leadership would be.