According to F-Secure's help manual, there are three levels of protection of DeepGuard:
• Default: This level allows most built-in macOS apps and processes to work normally. It does not monitor read operations on the computer, but checks attempts to write or run files.
• Classic: This level allows most built-in macOS apps and processes to work normally. It monitors attempts to read, write, or run files.
• Strict: This level only allows access to necessary processes. This allows you to more closely monitor system processes and built-in applications.
So I believe Apple's native apps are not monitored and are allowed to run smoothly. For other third-party apps, I have not noticed DeepGuard blocking their behavior, except for the app called pap.er. Screenshot is attached.
View attachment 275550