Client in Domain can't obtain IP address on 2nd NIC (connected to Internet Router)

Question

Goal is to control one Client remotely (keeping the other 4 Clients away from internet).

Initial Set Up (working for many years-nothing connected to internet):

A) Windows Server 2019 set up as AD DS DNS IPv4 ip 10.0.0.101 subnet 255.255.255.0 gateway 10.0.0.1 DNS 127.0.0.1 on 10Gb PCI-E NIC Network Card, Single Copper RJ45 Port, with Intel X550-AT2 Controller, PCI Express Ethernet LAN Adapter Support Windows Server/Linux/ESX, Compare to Intel X550-T1

B) NETGEAR 8-Port 10G Multi-Gigabit Ethernet Unmanaged Switch (XS508M)

C) Windows 10 Pro Client joined to the Domain with IPv4 ip 10.0.0.7 subnet 255.255.255.0 gateway . . . DNS 10.0.0.101 on TP-Link 10GB PCIe Network Card (TX401)

D) Four other Clients with same set up {ip addressed ending in 8, 9, 10, & 11}

Attempt to begin setting up Client (C) for control remotely:

1. Added second TP-Link 10GB PCIe Network Card (TX401) to Client (C) with IPv4 to Obtain an IP address automatically and Obtain DNS server address automatically
2. Connected to ASUS wireless router (GT-AC5300) {IP 192.168.50.1} with Cat6 ethernet cable
3. This Network Card fails to obtain an IP address in the router subnet {ipconfig shows 169.254.27.180}
   1. Tried same cable & same router with a Windows 10 Pro Computer that is not on the Domain {stand alone} and an internet connection is established