AppleCare + monthly payment options are extended to Canada, Australia and Japan. 24-month plans will be available for the iPhone, iPad, and Apple Watch, with 36-month plans available for the Apple Watch Edition and Hermes. Although not yet available, the support documents indicate the deployment (via MacRumors).
The documents say:
In the U.S., Australia, Canada, and Japan, when you purchase AppleCare + coverage for your iPhone, iPad, or Apple Watch, you can choose to pay monthly or in advance for 24 months of coverage. (For Apple Watch Edition and Hermes, you can prepay for 36 months.) If you prepaid, you can go to mysupport.apple.com to continue coverage * on a monthly basis after the end of 24 or 36 months. Monthly plans are automatically renewed until canceled.
Apple Care + monthly payments launched in the United States in September 2019. Prepaid users can switch to a monthly plan when the initial 24/36 month period is over. However, you cannot switch from monthly payments to an initial plan.
[How to Look Up Your Apple Warranty Status]