How to put clients on server side onto VPN LAN

I have a setup where I am using OpenVPN as a S2S vpn. I currently have it set to bridge and my three remote routers connect and get put onto the VPN subnet( and all works as intended. I need to take some devices that are directly connected to the Main router(OpenVPN server) and are on the LAN of that router and put them on to the LAN for l2 discovery reasons. Does anyone know how I could achieve this?

I have attached a diagram showing what I am talking about.

As a solution I ended up removing the eth0.1 interface(switch ports) and WLAN interfaces from the LAN interface and bridged them onto the OpenVPN interface.

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