If you truly need an ISO for old hardware, consider (formerly Flint OS). It is a Chinese fork of Chromium OS that provides official ISO downloads. It is not Google Chrome OS Flex, but it looks and feels identical. FydeOS supports Android apps (which Flex does not), but it requires a subscription for advanced features.
Standard Chrome OS is locked to specific hardware. Chrome OS Flex is the universal installer. chrome os flex iso
: You can often find the latest recovery images on Chromium Dash . If you truly need an ISO for old