It came to be the problem in my experiment’s setup. I’ve fixed that. Thanks for the reply!
It seems that the ipv6 ens3 address is pingable and reachable, ipv4 ens3 is pingable but unreachable, and the ipv4 en7 is unpingable (but this is what is used in the notebook and works), as well as my experience. (The commands are just normal ping commands with the address)
Instead of a bad ping output, the terminal just instantly said “Connect: Network is unreachable”.