Problem in Monitor network interfaces trafic linux server

[aria]

Hello. Zabbix Agent is installed on my Debian-10 machine, and this machine has been added to my newly installed Zabbix-5 and is being monitored. When I was adding this machine, I selected the Group on the Linux server and from the Templates menu, I selected the Template OS Linux by Zabbix agent option and the changes were saved. My machine is currently being monitored in Zabbix monitoring, but I do not have some items, such as the network interfaces for the machine I am going to monitor, and it does not display them. How can I monitor the traffic of my Linux machine network interfaces in Zabbix 5 monitoring?

[aria]

I have not disabled any options or macros.

[cyber]

How can I monitor the traffic of my Linux machine network interfaces in Zabbix 5 monitoring?

By identifying, why network discovery is not working for you. Is it disabled, is it in not supported state in some reason, are all the filters and macros there applicable for your host etc etc..