Zapp Tunnel Mode Z-tunnel 2.0 Domain Bypass

Hello, Community

I am testing Z-tunnel 2.0 bypass setting.
I tried to configure with Best Practice kb, I read multiple times.
https://help.zscaler.com/z-app/best-practices-adding-bypasses-z-tunnel-2.0

In this article, Domain Bypass Configuration section says

You can configure domain-based bypasses with custom PAC files for the forwarding profile and the app profile.

However Domain Bypass seems to be successfully conducted only with App Profile PAC file.

Why does this kb recommend Forwarding Profile PAC?
Does anything problematic happen only with App Profile PAC?

Best Regards,
Yosh