Routing specific services on the router itself via VPN

Installing and Using OpenWrt Network and Wireless Configuration
1

I have a router that is using WWAN as the main gateway - all traffic by default goes via WWAN
I have also 3 specific VPN tunnels (tun0, tun1, Amnezia)
I have installed PBR (policiy based routing) and it works like a charm, allowing devices in the network to access needed sites / IPs via needed interfaces.

On the router itself I have specific services - e.g. Internet Detector - that can send notifications via telegram.

Is there a way to route traffic from within the router to a specific IP / site via specific gateway / interface, as the router itself is not using PBR and is just routing all traffic via default interface - WWAN

2

For PBR from the router you need the output chain in the PBR app (default is prerouting chain)
So you can set a specific port or protocol or destination to use a specific interface
If there is a fixed destination just use that and specify the interface and use the output chain