Last year it appears around 3 preview versions of Windows Server on ARM architecture were released to the insider community - possibly one may have been bundled inside a Windows 10 Insider download.
Does anyone retain a copy of those ISOs and would you be willing to share for testing purposes? And what is the current status of this project?
There have been no releases of Windows Server on ARM to my knowledge. There are no plans to release Windows Server on ARM in the near future. Windows 10 on ARM, however, is available now.