Rayhan has roots in Kerala, India but is based in Dubai, where his parents and family live, but represented India during his amateur playing career. He spent five years on a scholarship at Oklahoma State University and featured prominently at one of the leading golf colleges in the United States. He is one of the hottest prospects to emerge from the Emirates in recent times and was the first amateur to win on the MENA Tour after being crowned champion at the Dubai Creek Open in 2016, aged just 16. A year later the 17-year-old equalled the world record (set by Mark Calcavecchia) of nine consecutive birdies in a round of 61 when he finished runner-up in the event. He also won the 2020 King Hamad Trophy, a professional event in Bahrain.

He wasted little time making his mark after recording his first win just months after turning professional at the KGiSL Presents Coimbatore Open 2024 Powered by Prima Donna, while making his debut on the Professional Golf Tour of India (PGTI). He is only the second player to ever win on his maiden PGTI appearance.