Google’s Checkout Links for Shopping are now accessible in additional countries, including Indonesia, France, Mexico, Argentina, Israel, and Australia.

Checkout Links simplify the path to purchase by taking users directly to a prefilled shopping cart with the selected product already added, reducing friction and making checkout faster.
This update was noticed by Emmanuel Flossie.
See the complete list where checkout links are available.
Read the official announcement here: Checkout on Merchant country expansion.