Yes, it is, for two reasons:
- Affinity company has replied to my request saying that there won't be a Linux version, ever.
- The hacks that exist to run Affinity on Linux are a moving rug, newer wine of affinity versions break stuff all the time. Don't rely on it.
Your best bet is to run Gimp3 (which is excellent), or Photopea online. Learn Photopea so you can know Photoshop if in the future a future employer requires it, while for your own projects, learn Gimp3. I run the official Appimage without any issue.