Downgrade to Windows 10 ARM

Hi there,
Yesterday I got myself a Parallels subscription. I use a Mac mini (M1). I tried to find a Windows 10 ARM version but got automatically upgraded to Windows 11. The program I need to run does not support Windows 11 (yet). At least not with the M1 chip via Parallels. Does someone knows how I can get the Windows 10 ARM file as customer service kinda ignores me as they could not help me yesterday either.

Thank you very much in advance! Your help is highly appreciated.