I use a Garmin ForeRunner 235 which stupidly doesn’t have a “Walk” option, so I have to use “Other”.
I have to edit these manually in Strava and change them to “Walk”. However, it now doesn’t seem to want to sync these with CityStrides (or maybe I’m just not being patient enough…?)
Not sure why that link didn’t show up pretty like @m_l_heywood 's did… But it is by the same guy as “Hike”, but it records the activity as a walk. Screens may show slightly different data, so it’s whatever works for you.
If you go to the settings page (upper right corner pull-down), then to " Activity Trackers", there is an option to Sync Single Activity. I know it exists for Garmin, so I think I would give that a try.