When the license is valid, the network interfaces info to be displayed seems to be taken from previously populated feactl_p. If license is invalid, the info seems to be taken from "get_network_interfaces" by iterating through the interfaces. Without adding virt_nics to feactl, unable to display vtap interface correctly in cli when license is valid. 
    if_info.tg_nics = feactl_p->tg_nics;
    if_info.fb_tg_nics = feactl_p->fb_tg_nics;
    if_info.mlxen_nics = feactl_p->mlxen_nics;
    if_info.i40e_nics = feactl_p->i40e_nics;
    if_info.t5g_nics = feactl_p->t5g_nics;
    if_info.hg_nics = feactl_p->hg_nics;
    if_info.wx_1g_nic = feactl_p->wx_1g_nic;
    if_info.virt_nics = feactl_p->virt_nics;


    if (feactl_p->ca_model_idx == AFM_INVALID_MODEL) {
            memset(&if_info, 0, sizeof(if_info));

            if (get_interface_info(&if_info) == -1) {
                    syslog(LOG_EMERG, "show_license call get_interface_info.get_interface_info return -1....\n");
                    fastlog_static(LOG_CRIT, FC_INF_READ_ERR);
                    return(0);
            }
    }

As you mentioned regarding licensing, currently maximum NICs is enforced by adding 10g NICs, 1g NICs and fxp NICs. Either virtual NICs need to be added to the total NICs or virtual NICs need to be considered as 10G NIC for this purpose.
    if (data_p->if_info_p->g_nics > 0) {
            total_nics = data_p->if_info_p->g_nics;
    } else if (data_p->if_info_p->fxp_nics > 0) {
            total_nics = data_p->if_info_p->fxp_nics;
    }
    /*
     * Not sure if 10G interfaces are mutually exculsive from non-10G
     * interfaces.  Either way, it's safest to just add the two together.
     */
    if (data_p->if_info_p->tg_nics > 0) {
            total_nics += data_p->if_info_p->tg_nics;
    }

    /*
    * Read licensed number of NICs from the license key data
    */
    uint64_t features = data_p->features;
    int max_vapv_nics = AFM_GET_FEACTL_NIC(features);

    /*
     * Compare actual number of NICs with the number of licensed NICs
     */
    if (total_nics > max_vapv_nics) {
            printf(ARRAY_PRODINFO_vAPV" license only allows %d network interface(s).\n", max_vapv_nics);
            return (-1);
    }

As network interface info needs to be taken from feactl when the license is valid, marking this issue as fixed as per discussion with Wang Li