I imagine it could be implemented relatively easily as override to genital check functions, that effectively renders Steele as lacking genital(s) with chastity equipment. Since it's already possible for Steele to lack genitals (altogether), and the scenes have to check for that.
However, that's presuming the goal of such exercise is to disable sex scenes (or passages) which rely on given orifice being usable. If what the poster actually wants is acknowledgment there is a chastity device and content based on that, then yeah, don't see that happening given the amount of work it'd involve.
That was why I was wondering if it was even possible. I figure it wasn't possible, considering the immense amount of effort it would take. A specific NPC for it might be interesting though. Either it is only worn during interactions with that NPC, or its kind of treated like the collars. It is noted in the appearance menu, but Steele is just treated as lacking that genitalia for all scenes except for the specific NPCs that comment on/have scenes involving it.Pretty much all sex scenes currently in-game assume Steele is not in chastity, so implementing it as a generic thing would require re-writing most of the game and thus won't happen. It can be implemented as a specific thing, though, if it's either for an NPC (see: Inessa) or "normal gameplay -> find an NPC with scenes supporting Steele-in-chastity content -> chastity on -> sex scene(s) -> chastity off -> normal gameplay".