Recommendations

The Judge Returns and Familiar Wife are similar because both revolve around the idea of getting a second chance to fix past mistakes and rethink life choices. In Familiar Wife, the male lead wakes up in an alternate reality where his marriage and life are completely different, forcing him to confront the regrets and emotional neglect of his past, while The Judge Returns gives its lead a chance to go back in time and correct his failures through justice and moral responsibility. In both dramas, the protagonists start off flawed and emotionally immature, and the second chance becomes a catalyst for deep self-reflection, personal growth, and learning how to love better. They blend fantasy elements with very real emotional struggles, questioning whether fate controls life or whether choices do, and ultimately emphasizing that growth, accountability, and changed behavior matter more than simply rewriting the past.

There are no real similarities other than both dramas being xianxia. But I'm recommending When Destiny Brings the Demon if you've already watched The Untamed for three reasons:
1) comedy
2) costume design
3) jin ling (iykyk)

On his wedding night, young hero Baili Deng Feng’s beloved wife Ru Yan mysteriously disappears. During three years of desperate searching, he meets Jia Xuan, a girl seeking revenge after her entire family was slaughtered. Together, they experience a series of strange events, leading Baili Deng Feng to discover the existence of Spirit Masters and Spirit Disciples. As mysteries surrounding their obsessions are gradually unraveled, Baili Deng Feng moves closer to uncovering the truth.

Also a Korean reality dating show, similar challenges, with 8+ people living together in a house. They are all trying to find love, some girls are also older than the boys. Age reveal is also later in the series. Cute couples form and similar dating trips and the same slow romance.

A spiritual sequel that sees Shih Szu's character from The Lady Hermit taking over the mantle of her teacher.

The leads go to the same school and caught feelings for each other. They then get together and have a relationship.

They both have the leads falling in love in school and and pursuing. Long time crush for the leads. End up together

They both have the female lead and they both have the female lead having a crush on the male lead and pursuing him

Both have strong male and female lead with a touch of xianxia elements. Male lead is a warrior and female lead is a demon

Both have a character transmigrating into a story book and living the life of the character in the book.

Both have a character transmigrating into a story book and living the life of the character in the book.

Both have a character transmigrating into a story book and living the life of the character in the book.

Both have a character transmigrating into a story book and living the life of the character in the book.

Both have a character transmigrating into a book/script and living the life of the character in the book.

Both have a character transmigrating into a story book and living the life of the character in the book.