I agree 100% on chargers. Unfortunately, these are pretty niche products and to include country/region specific chargers is difficult, especially if something is not selling as well in one region and selling more in another region. It is easy to shuffle inventory to meet demand. If AK were a billion dollar company like Apple, it would be easier.
Power delivery via UBB port varies by computer and even from port to port, the power output may not be consistant, which is why it is not recommended. You can certainly do so and not harm the device.
Perfectly safe as those are in the range of acceptable power output. As the CA1000T supports PD 2.0, any PD 2.0 rated charger would be supported. I also recommend any Qualcomm 2.0 or 3.0 certified charger as they would work without issue.
The North America team usually edits the manuals for English as sometimes the translation from Korean is good, but could be misleading. We did not do the CA1000T for some reason, I believe the UK team did. What should be said was that the cable is not proprietary and any quality USB cable could be used. You may experience issues using a lower quality, cheap cable as they may not be up to USB spec. I personally am a fan of the Anker USB cables and use them with all my AK products. Anything that is over a few dollars should be good to use and not cause any issues.
No issues with any of these being used with the CA1000T
Again, apologize for the delay in getting back to you. Feel free in the future to PM me if it is urgent and you have not received a response in 24 hours.