Looking for Recommendations

Hey everyone, I already posted this on a different subreddit, but crossposting isn't allowed. I hope this is okay though.

I am looking to buy a smartwatch that is able to do the following/fits these requirements:

• Track my sleep. I have insomnia but am currently on sleeping medication so this information could assist in my treatment.
• Alarms & Notifications buzzing on my arm. I cannot stand the sound of notifications, in sound or in buzzing. So my phone is always on silent. This would be a good alternative.
• Have a long lasting battery life.
• Tap to Pay.

The next are things I would like to have, but I am willing to compromise on.

• Heartbeat + Fitness tracking. This is just kind of a nice to have? I don't exercise a lot, but it would be good to have an idea of how much I do, to find easy ways to add to my existing routines. This could also be helpful data for anxiety + some of my other conditions.
• LTE / Able to do all of the above offline.

I was looking at a Xiaomi watch since that's the type of phone I have right now. But I will also be getting an old Samsung phone soon, so I don't mind getting a Samsung watch if that will be better. I was recommended Hauwei watches by a few friends & family but it doesn't have any Tap to Pay functionality so I'm not sure about it. But if its the best of all the other things I want I am willing to go that route.

Thank you in advance!