The Wear OS H-MR2 update is now receiving a wider rollout, rolling its release on the Suunto 7 in September. H-MR2 continues to be based on Android 9.0 Pie, but it promises improved battery life and better performance among other changes. You may need to check manually for the update on your smartwatch, though.
https://www.notebookcheck.net/Google-begins-rolling-out-the-Wear-OS-H-MR2-update-to-more-smartwatches.507244.0.html