They were Vivoactives. They had pace, not average speed.
Regardless of what the focus of the watch is, the cycling app should show cycling stats.
It's incredibly low effort to get something so basic wrong.
Seems like your post was incredibly low effort, as the Vivoactive (all the way back to the blocky original) supported speed fields.
https://averagejoecyclist.com/how-to-use-garmin-vivoactive-3-record-bike-ride/
That's not the Vivoactive cycling app.