Aliexpress
Click here… to search for Xiaomi Redmi 10A 4/64GB G25 on Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in Hong Kong.
Link: Banggood product page
Coupon (135.59 USD): Cuponation9
Coupon (135.59 USD): BgGoodie9
(CouponsFromChina.com tip: coupon code has to be applied in shop’s cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): COUPONSDE1wk
(these coupons are old, so probably won’t work)
Price history and price alert
Price history (for all/most countries) for Xiaomi Redmi 10A 4/64GB G25 is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).