Fenix 6 PRO not syncing to the Garmin app on my Apple phone

I have had my Garmin Fenix 6PRO since 2020 and it would sync to my phone no problem for years.  Over this past year it has had issues.  it would take a week before it would sync.  Now it won't sync at all.  i have turned off and on everything, my phone, my watch, Bluetooth, etc.  No luck.

I read where I can delete the app but it warns me that my data would be deleted from the app so I have not tried this. 

Unit ID 3313618846

Software version - 28.02

I was not sure what to do try next.

Thanks,

Maggie