this combination is used in personnel screen to tab between soldiers and also on geoscape to tab between dropshops. I don’t know if there is any keybinding list in the game. And even if there is, then probably it doens’t cover all combinations. There was topic on this forum with it but it probably has become not so accurate according to full release.
This one, because you can’t display one specific value, because enemies will see that soldier from different angles and their line of sight will determine value which they see.