can someone help me define these DTC code p0420 P22AB?

Please list which engine you have when there's an engine-related problem. I looked these codes up for a 2.5L engine, non-hybrid. There's two versions of diagnostic charts, depending on the date the vehicle was manufactured. Both are about 30 pages long.

P0420: Catalyst System Efficiency Below Threshold Bank 1 (SFI System, A25A-FKS) [06/2017 - 08/2018]

I can offer a condensed version of what it takes to set this code. You may be able to verify this with your scanner. Look under the "Live data", "Sensor data", or something similar under the "Engine" menu. In that live data, look for the oxygen sensor readings.

During normal operation, if there's too much unburned oxygen in the exhaust gas, the front, or "upstream" oxygen sensor develops a voltage to indicate how much, but it can't measure a lack of unburned oxygen. Instead, the Engine Computer commands a fuel / air mixture that's too lean, then too rich. That switching action occurs roughly two times per second. Based on the length of time it's in one state, the computer can calculate the average time the mixture is in each state, and it makes adjustments in the length of time it pulses the injectors open.

Given the low mileage you listed, I suspect some type of contamination is the more likely cause. It's too soon to expect a normal failure. Most import catalytic converters have no trouble lasting 200,000 to 300,000 miles.

P22AB17: A25A-FKS (ENGINE CONTROL): SFI SYSTEM: P22AB11,P22AB12,P22AB13,P22AB16,P22AB17,P22B211,P22B212; A/F (O2) Sensor Positive Current Control Bank 1 Sensor 2 Circuit Short to Ground; 2018 MY Camry [03/2017 - 06/2017]

This code refers to incorrect voltage, possibly something shorted to the oxygen sensor heater circuit. This also has a really long diagnostic chart. I'm going to have to save these pages, then I'll format them at home tonight so they can be posted later if you need them.

For this the cat needs to be replaced, 9 times out of 10.

I'd want to look into the second code, but it is absolutely correct, the most likely solution is a new catalytic converter. My other concern is what caused such an early failure?

I'm going to post the diagnostic charts anyway for you to look through. Because they're so long, I'll post them in two separate replies to reduce confusion. This list is for code P042000.

Here's the chart for code P22AB17 and other related codes.

To add another thought, excessive unburned fuel in the exhaust, from a spark-related misfire, can cause the catalytic converter to get red hot. That's when the catalyst material melts into a rock that blocks exhaust gas flow. That high temperature could also damage an oxygen sensor, which might have led to the second fault code.