Unfortunately just forget it. Movescount will soon not be used as a data analysis tool anymore and all the syncing will be moved to Suunto app. Maybe you should suggest this as a feature for Suunto app?
Maybe because I have a wear os watch, but my suunto syncs across to google fit without any issues; as I know that normally google fit doesn’t allow apps to sync to it, but rather syncs to them, but with a S7 it does sync my data from suunto directly into Google Fit.
However if you need a S7 (or wear os watch to do this) look at an app like SyncMyTracks (Android/iOS) which has the ability to sync data either way. Find it really useful to sometimes sync google fit tracks across to suunto as I prefer using google fit for strength training, as so much better in terms of what it tracks and has auto-detection for exercise, reps & sets, with manual weight input and the ability to change any detection and or manually add workout.