Thanks to its latest software update, the Forerunner 945 has gained several features from the Fenix 7. The update, which arrives as software version 9.56, is available to download now from Garmin's website.
https://www.notebookcheck.net/Garmin-Forerunner-945-benefits-from-Fenix-7-features-with-its-latest-extensive-software-update.611716.0.html