Moving localhost dedicated server to remote dedicated

I have packaged a working Server and Client Game in UE5.2, which works on my localhost. I now want to move it to my external dedicated server where i already did port forwarding etc. The problem is that i can’t see a join message in the server logs when joining.

The server uses port 7777
“LogNet: Created socket for bind address: 0.0.0.0:7777”

The port 7777 is forwarded on my dedicated server. To connect i enter following command in order to join it:
HauntedRealmsTwoClient.exe :7777 -WINDOWED -ResX=800 -ResY=450

This exact method works 100% on my localhost, when i run the server + client locally. The join message is displayed in console there.

Hoping for good answers, thank you all.