Since I am leveling my Nightborne Mage rn in the last few days, I do realize that on Horde Orgrimmar is pretty, pretty dead compared to Stormwind on Alliance side.
I have seen more players recently of both factions at Legion Dalaraan, but any other places where Horde players do RP?
Horde roleplay in general is much more guild-focused than on Alliance side. Even on its best days, Orgrimmar was never as active as Stormwind in terms of open RP, and those days are long gone now.
You can still find RP in Valley of Honor and in Silvermoon (though rather sporadically, I think? Haven’t been there in months.), but other than that, finding a guild is likely your best bet if neutral RP isn’t your cup of tea.