Access to 2 different tailscales via a different local lan

Hello.

At a friend home we established this configuration. Every device has installed Openwrt. I would like to be able to do:
a) Access the 192.168.30.1, 192.168.30.99, 192.168.40.1, 192.168.40.99 via the main router 192.168.1.1 leveraging the dumb ap. I don't want to install other Tailscale clients since they don't go along very well with PBR and Wireguard.
b) Leveraging the PBR and the wireguard server installed on the 192.168.1.1, when connected in LAN or VPN, redirect some traffic towards some specific exit routes.

Is this feasible?