I really wanted to get a smart watch / fitness tracker. I just never knew why. Maybe because I like the tech? So I did. Apple watch 9. Beautiful looking thing. Wore it for couple of weeks and returned it. Why? I see no real reason or purpose that this will serve in my life. Most metrics are an approximation at best.
- HR will never be as accurate as your strap you wear while cycling
- sleep data? That will all depend on how you wear your watch and again, hit and miss BUT most importantly, when was the last time you woke up from having a ****** night sleep (getting up, tossing turning etc) to say yeap I feel rested. And the vice versa. There fore useless.
- training data? Well the watch will tell you to rest 48h before you ride again after a hard ride. Are you going to listen to it? Why would you when next day you wake up and you are rested? According to my Garmin computer during my last cycling trip to Mallorca, I should have quick after day 2 and spend the other 5 days in bed. Therefore useless.
- txts? Calls? I want to get away from those not get more of them in my life.

I just dont see the reason.

In your case, ask your doctor what metrics do you NEED. Get a watch that will support that. I am willing to bed AW SE2 will get you EVERYTHING that you will need.