Ok, so you’re using the dual_chan_pkt_fwd now and not using the single channel packet forwarder you alluded to in your other post. It could be the problem here if things weren’t set up right but you are still right that you have apparently received packets. Are you using the Dual Channel setup that Batigolle has used?
The next assumption is that the reason you’re not seeing it in TTN is that the packet is not meant for TTN. I pick up random packets here in Montreal that I know do not show up in my Gateways count, as I can pretty much guarantee that that count number I see are all messages from my sensors. At least on my test gateway as it’s not that high of a number.