Huawei has issued another update to the Watch GT 3, its second so far. This month's update is a 75 MB download and allows you to pair the smartwatch with the Polar H7 or the Suunto Smart Belt. The update is already rolling out in Europe.
https://www.notebookcheck.net/Huawei-Watch-GT-3-receives-a-software-update-that-enables-the-option-of-connecting-heart-rate-straps.583944.0.html
Coming to GT2? That would be amazing!!
And why isn't this feature available on the Watch 3 / 3 Pro? >:(