I have a Raspberry Pi 4B with the latest Raspberry Pi OS intalled. So I have a USB dongle which is connected to the internet and shows up on Raspberry Pi as 'eth1' interface. I want the lan port of Pi to output internet which goes into the WAN port of my TP-Link router and then I connect all my devices to the router. I followed the guide here on this page https://stackoverflow.com/questions/41766414/use-raspberry-pi-as-a-bridge-b-w-mobile-and-router#:~:text=To%20do%20so%20you%20need,should%20be%20recieving%20internet%20connection The bridge was set up successfully and I could access the internet from router. However I couldn't access Pi over SSH which is something that I need since it is a headless setup.
The whole setup -
USB Dongle (internet) [DHCP] -----> RasPi 4B ------> TP-Link Router (DHCP) ----> Devices (Laptop/Phone)
Please tell how should I proceed with this