The current EasyRE demo video lists a partition /dev/sda1, a *nix layout.
It is true that MS stops companies from distributing their software permission and it is also know the cases of allowing companies to sell Windows PE in return of a commission for each sale. See for example Winternals (before being acquired) or NeoSmart with their ready-made boot disks: https://neosmart.net/EasyRE/
Hence I doubt distributing Windows PE currently, no idea about real contents.
Yes, neosmart offered a Windows PE to buy in the past.
Did MS stop neosmart to redistribute a builted PE?