I am an automobile technician in the UAE, and I own two workshops in Pakistan. Let me explain some technical aspects to you. If you experience a lack of pickup in your car, it's not necessary that only the catalytic converter is clogged. You should consider getting a general tune-up for your car, which includes cleaning and calibrating the throttle, adjusting valve clearance, cleaning the EGR valve, cleaning the fuel pump, and cleaning the catalytic converter.
However, if you suspect that the issue is only with the catalytic converter, you should visit a technician who has a borescope. They can inspect catalytic converter with borescope by dismentling the oxygen sensor. If it's clogged, there are two methods to clean it: using acid or using a catalytic converter cleaner solution which the recommended solution. Many companies offer these cleaners like stp or liqui moli and also use fuel additives like octane boosters