Buying AppleCare online for a China-purchased Apple Watch while in Bangladesh (within 60 days)

Hello Apple Community,

I am seeking urgent guidance on purchasing AppleCare+ for my new Apple Watch.

• Device: Apple Watch Series 10 (46mm, Aluminium, GPS, China variant)
• Purchase Date: June 2, 2025 (purchased directly in China)
• Current Location:  Bangladesh
• Current Status: My online coverage checker shows "AppleCare Eligible: No."

I understand that for devices purchased in mainland China, there's a 7-day window for direct-on-device/phone purchase, and a 60-day window for in-store purchase. As I am currently in Bangladesh and will not be returning to China in the next 3 months, visiting an Apple Store in China is not an option for me within the 60-day deadline (which is around August 1, 2025).

My primary question is:

Is it possible to purchase AppleCare+ online for an Apple Watch that was bought in China, while I am currently located in Bangladesh?

If so:

1. What is the specific online process or the best way to initiate this purchase from Bangladesh?
2. Are there any particular regional considerations or potential hurdles I should be aware of, given the device's origin (China variant) and my current location (Bangladesh, where there are no official Apple Stores)?
3. Why might the online coverage checker show "AppleCare Eligible: No" even though I am still well within the overall 60-day purchase window?

I have my original proof of purchase from China ready. Any advice on how to proceed from here to secure AppleCare+ before my eligibility expires would be immensely helpful.

Thank you!