Sources -

The Greek Myth of Soulmates, When Human Became Humans:

https://www.greecehighdefinition.com/blog/the-greek-myth-of-soulmates

A Brief History of Soul Mates:

https://medium.com/lessons-from-history/a-brief-history-of-soul-mates-ab4210386680

Seven animals who mate for life:

https://www.bbcearth.com/news/seven-animals-who-mate-for-life

Yue Lao:

https://mythopedia.com/topics/yue-lao

The Science Of Soulmates...Explained By Spooky Quantum Entanglement:

https://www.charleneeckstein.com/blog/soulmates-do-existexplained-by-spooky-quantum-entanglement