Sleep Coach disappeared from Home Screen both on Garmin Connect app and PC

I recommend to Remove and Add the Device From the Garmin Connect App | Garmin Customer Support, wait till the next morning, sync, and see whether it helped. If not, then have a look at the Troubleshooting guide for (some) data missing after syncing for more tips. 

Thanks, 

Probably try that to see if it works.

Sleep coach only shows if you got any deviation from your normal amount of sleep need.

Check the sleep coach in the sleep page: More > Health Stats > Sleep > Sleep Coach

aduarte said:

Of course that I can access sleep coach on app and PC

Ah, OK, in that case removing and adding the device makes no sense, you can skip that. Rather check the settings of the Home Screen, if the Sleep Coach glance did not get accidentally disabled.

First thing I did on both app and pc, both were enabled, I even disabled and enabled again, still nothing.

Besides what Andy wrote, the Sleep Coach will also not appear on the Home Screen under the following conditions:

Sleep Coach Feature on Garmin Watches | Garmin Customer Support

NOTE: Sleep Coach will never recommend less than 7 hours of sleep or more than 9 hours of sleep. Additionally, the Sleep Coach card on your Home page in the Garmin Connect app may not display if your sleep coach is recommending a change less than 50 minutes (above or below) your baseline.

Do not ask me why. I think it does not make much sense, but unfortunately it is designed in this way.