@Sumukh Rao
I am perplexed by your decision to choose the Amazfit T-Rex 2 as your #1 pick for as watch for SCUBA diving. This begs the questions: “What makes you qualified to determine this?” – “What criteria was used to generate your picks?.
While the Amazfit T-Rex 2 is a durable budget smartwatch labeling it as a #1 pick for SCUBA diving is a stretch considering the other models in the list ARE for diving and most importantly have dive software. At best, the Amazfit T-Rex 2 might be a good budget watch for snorkeling and other water sports. But, recommending a watch never intended for SCUBA diving is potentially a dangerous suggestion.