What is used in an ipv6 for local device to learn the layer 2 ethernet address of a device that is on a remote nonlocal vlan?

The devices in IPv6 only need to learn the Layer 2 Ethernet address of a neighbor that is directly connected, and only if they need to communicate with each other on that local network. If the device you are trying to connect to is remote, you will forward the packet to your default gateway's Layer 2 address.

NDP (Neighbor Discovery Protocol) is used to learn local neighbors' Layer 2 Ethernet addresses when needed.

ARP is an IPv4 method to learn a local device's Layer 2 address.

The RIPng (RIP next generation) is RIP version that support of IPv6 networking ...