Hello guys, i have a problem with network interface in Proxmox. My company has a VPS on contabo, in this server was installed Debian 11, but for our business we will need a virtualized server that supports some PABX VMs. It turns out that we installed Proxmox via command line following the tutorial: https://docs.vultr.com/how-to-install-proxmox-virtual-environment-on-debian-11
The installation was successful. But when I create a VM, no network interface option appears . What do I need to do to fix this? The public IP that contabo provides me is the same IP as the internal network of my proxmox (seen by the ifconfig command)

Nothing appears here

Content of /etc/network/interfaces
The installation was successful. But when I create a VM, no network interface option appears . What do I need to do to fix this? The public IP that contabo provides me is the same IP as the internal network of my proxmox (seen by the ifconfig command)

Nothing appears here

Content of /etc/network/interfaces
Bash:
# The loopback network interface
auto lo
iface lo inet loopback
# The primary network interface
auto eth0
iface eth0 inet static
address xx.xxx.xxx.xx
netmask 255.255.248.0
gateway xx.xxx.xx.x
dns-search invalid
dns-nameservers 194.140.196.52 194.140.196.51
up ip route replace xx.xxx.xx.x/21 via xx.xxx.xx.x dev eth0
iface eth0 inet6 static
address 2605:a143:2194:4412:0000:0000:0000:0001
netmask 64
gateway fe80::1
accept_ra 0
autoconf 0