Had a lengthy mail exchange on that topix with them - before them being bought, though.
While they don't plan a native Linux version they absolutely were open to optimise towards better Wine usability - which I totally could live with for now.
But I have no idea how the buying by Canva influenced things - Canva does have a linux app so maybe there are more resources and a different focus now.
I tried it with bottles. It installed fine after manually installing dotnet 4.8, but I couldn't get Affinity Photo itself to run, even after extensive tweaks. All I get is an exception without any description in the terminal output.
Are they actually .Net Framework apps or they just use it for some parts? If they are, they could transition to .Net which is cross platform. With some work, of course.
The Affinity Suite started out as macOS-only apps which later got ported to Windows so I would be very surprised to hear they had any substantial portion written in .net