Hi from argentina!
I've Proxmox VE 7.0 and hasn't internet on host (The VM and CT yes have internet!)
My config:
ip route
default via 10.1.1.1 dev vmbr0 proto kernel onlink
10.1.1.0/24 dev vmbr0 proto kernel scope link src 10.1.1.229
cat /etc/network/interfaces
# network interface settings...