Hi all , need some help please .

I have a linux client running an installation of home assitant server.  

The client is obtaining a dhcp address and has full network functionality on the lan including gateway and dns access but the address it was assigned is not listed in the deco app ui thus its impossible to reserve an address for it from the dhcp server also all other services including port forwarding can not be applied on this client as it is not identifiable on the network by the deco app ui . How to solve pls ?