If I have an IPv6 address, how can I find its MAC address?

How to find the MAC address of a router? - Network Engineering Stack Exchange

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sed - How to use shell to derive an IPv6 address from a MAC address? - Unix & Linux Stack Exchange

Find an IP Address using a MAC Address: Step-by-Step Guide

IPv6: How Windows generates Link-Local Addresses (EUI-64) –

MAC address vs IP address: What's the difference? – BlueCat Networks

Find a Router IP Address in Mac OS X

IPv6 On Mac Enable ▻ Disable ▻ Troubleshooting Cheat Sheet

What is MAC Address? - GeeksforGeeks

Mac address abuse message from Hetzner — LowEndTalk

How to Find Your IP and MAC Addresses in Windows

With MAC addresses embedded inside IPv6, how will an individual's security be protected? - Quora