Apparently ProtonVPN has implemented this feature in Windows:

Proton removes restrictions on simultaneous feature usage on Windows
- Users can now use Split Tunneling, Kill Switch, and NetShield altogether
- Split tunneling is currently in beta for Mac and Linux users

If you’ve been using Proton VPN on Windows, you’ve likely encountered a frustrating "pick two" scenario. For a long time, the app forced users to make a compromise: if you wanted to use split tunneling to route specific apps outside the VPN, you often had to disable other critical security features.

According to an X post by the company, that friction is finally gone. Proton has just rolled out an update for its Windows application that allows users to enable Split Tunneling, the Kill Switch, and NetShield simultaneously.

"Proton VPN's latest update on Windows lets you benefit from all three at once, so you can feel relieved while you browse the internet securely," the company tweeted.

If this is available in Windows; why not available in Mac OS?