Well, without more information, it's difficult to determine a definite real story. It might be a local or regional belief. Maybe 'bhagat' refers to a devotee and the phrase could imply that the devotee has a special connection with the divine, but this is just speculation.
It might be about a couple who are separated due to some misunderstandings, and then they try to find their way back to each other in the 'gum hai kisi ke pyar mein star plus story'. For example, one of them might have made a sacrifice for the other's happiness, but later they realize they can't live without each other.
One way to find the story is to ask around in communities that are interested in the same type of literature. Maybe there are groups on social media dedicated to such stories. Another option is to contact local cultural centers or institutions that preserve and promote such stories.
I'm sorry, I don't know the specific 'Rishton Ke Bhanwar Mein Uljhi Niyati' story. You could try to find it in local libraries or by asking those who are familiar with this particular piece of literature.
You could try searching for it in local libraries. Look for books in languages relevant to the title, perhaps it's from a regional literature. If it's a modern story, check online e - book platforms or literary websites.
Often, there is a tradition of the elders in the family giving blessings to the newlywed couple. This can be in the form of words of wisdom or special religious blessings. Also, in some places, there is a custom of lighting candles or diyas around the place to bring in positive energy and light into the new union.