Subnet 192.168.2.0 interface not created on Ubuntu Linux system or VM

You should also check if you config the ECM interface in UART console:
root@swi-mdm9x15:~# configEcm show
target.ipV4: 192.168.2.2
host.ipV4: 192.168.2.3
netmask.ipV4: 255.255.255.0
DONE