Eth0 device is down after NIC change in Hyper-V

Ubuntu Version:
24.04

Problem Description:
I created VM in Hyper-V with Ubuntu. I want to Ubuntu have connection to my LAN so I’ve created switch with connection to external network. But after I switch NIC in VM from default switch to external network switch, VM lost connection to internet and “cable unplugged” in Network settings (with default switch I have connection to internet but I couldn’t ping my local LAN devices). What should I do to have LAN connection?

Screenshots or Error Messages:
https://dpaste.com/9FFBTD5J4

What I’ve Tried:
None, because I don’t know where to start.