In https://download-center.dxo.com/Support/docs/NikCollection_v5/release-notes/Nik5_release-note_mac_EN.pdf
I read the Nik Collection 5.1 could not be used with Affinity Photo on Mac with Arm.
Known Issues and Limitations
• Nik Collection cannot be launched from Affinity on Mac with ARM.
But its working very well on my 24“ M1 imac.
And now?