As there are no transsims in the game I assume that you mean female sims in male clothes or the other way around. Or are you talking about some kind of mod you are using? I see from the last picture that you have broken Mods/CC in the game. Move your Mod...
This game is about competitive combat. Maybe everyone should consider the SIMs if they are looking for an extensive selection a clothing.
This is a male restraint body harness for Better Males - Favored Soul Meshes bodies. How to obtain: You can obtain the harness with the console command "help Male Body Harness 0". Requirements: Better Males - Favored Soul Meshes - https://www.nexusmods.c