Garmin Express is shown like mirror

Does it happen on the screens of other watch faces or CIQ apps too? If not, then contact the developer of the concerned watch face and report it. There might be some broken Unicode character or CSS code in the title or labels, turning on the mirroring. Perhaps even done on purpose as a joke

The top of the screen (question mark, gear, minimize....) is also mirrored so problem seems to be in Garmin Express? Home button should also be on the left. Re-install or update Garmin Express.

I'm also using Dash - Dash | Garmin Connect IQ

No issues with orientation with this watch face or Garmin Express.

Hello,

it's happening on all watch faces including the Garmin Watch face

As mentioned, reinstall Garmin Express, then contact Garmin Support if issue persists.