There is a support for widgets for Oregon 7xx devices in SDK. It is there for long time (since 2.0 SDK I guess).
There are some of widgets in app store:
https://apps.garmin.com/en-US/devices/oregon750/appTypes/widget/apps
Widgets capability for Oregon 7xx advertised here:
https://developer.garmin.com/connect-iq/compatible-devices/
But it is not introduced in firmware, there is no way to launch widget. Just a question - will it be updated and support added?