Even though it might seem magical when someone sits down …

https://www.musical-u.com/learn/chord-ear-training-101-2/
Even though it might seem magical when someone sits down at the piano or picks up the guitar and seems to know every song, with a little chord ear training, you can do it too! Get started with the Musical U team. https://www.musical-u.com/learn/chord-ear-training-101-2/