I know this is an old post, but it looks like Win 10 Home is supported. The page (https://docs.microsoft.com/en-us/power-automate/desktop-flows/setup) is a bit confusing:
A device that runs Windows 10 Home, Windows 10 Pro, Windows 10 Enterprise, Windows 11 Home, Windows 11 Pro, Windows 11 Enterprise, Windows Server 2016, Windows Server 2019 or Windows Server 2022. (full stop here) ARM devices are not supported.
EDIT: I saw this further down the same web page
If your device runs Windows 10 Home, you can use Power Automate to create your desktop flows and monitor them on Power Automate. You can't trigger desktop flows to run from the cloud on Windows 10 Home devices. Other types of desktop flows (Windows recorder V1 and Selenium IDE) are not supported.