Migrating to Standard Load Balancing can sometimes disrupt internet access due to differences in default settings. Have you checked if "Standard SKU" public IP is associated with the VM? Unlike Basic LB, Standard LB requires an explicit outbound connection setup.
Also, since you mentioned that you don’t need load balancing, have you tried removing the Standard LB and directly associating a Public IP with the VM’s NIC? That might simplify the setup.
For a detailed guide on optimizing Azure networking, you might find this resource helpful: Network Optimization Tips. 🚀