Think it's a bit like TOS in that regard, Kirk, McCoy, Spock got character development but that was it. Even McCoy got a bit shortchanged-although he did have a few romantic interests there's an interesting backstory about his ex-wife and estranged daughter that was going to be mentioned but the episode plot was changed and became The Way To Eden. She did get a name drop in TAS though and the ex-wife is mentioned in the Kelvin continuity. Maybe if SNW brings in McCoy....
TNG/DS9/VOY and even ENT were kind of more ensemble shows and ran long enough for all the characters to get spotlights. Detmer, Rhys, Bryce, Owusekun don't really get a lot of development apart from a few 'cool' moments here and there, or the occasional away team episode.