Did share this as "Idea" to Garmin, but adding it also here.
Apparently Ice Skate doesn't support navigation reasons unknown to me. People do things like "Tour skating", where one would like to use course to support the route planning when skating. Now have to use some different activity as for reasons unknown to me, there is no navigation option if I do "Ice Skating" -> "Outdoor".
Same thing did seem to be also in my Forerunner 955, so at least these are on sync on this, but meh :(