In Azure , if you create a Subnet 192.168.0.0/24 , Azure Sets Aside 192.168.0.1 for you as the Default Gateway

On Spinning up an IPV6 Subnet Recently , I thought this would be the same e.g. fd10::/64 so the Gateway would be fd10::1

Incorrect , after trial and error , I spun up a machine on DHCP on the network to determine the gateway was actually fe80::1234:5678:9abc for this network which I needed for Next Hop on my Router