Direct Answer

What the Label Confirms
The Steam store identifies the anti-cheat product as Easy Anti-Cheat and displays the “Uses Kernel Level Anti-Cheat” label. It does not, by itself, document driver behavior, privacy settings, installation steps, or individual error fixes.
Linux and Steam Deck
Do not treat Proton or Steam Deck play as officially supported. Third-party reporting quotes the developers as saying Linux is not officially supported while Proton support is being worked on. Check system requirements and the current Steam listing before installing.
FAQ
What anti-cheat does WARDOGS use?
Easy Anti-Cheat, according to the official Steam page.
Is every EAC error documented?
No. The official store page confirms the product, not a complete troubleshooting catalogue.
Related Guides
Check PC requirements See Beta access
Sources
Official Steam store page
Linux status report quoting developers