The facts as I understand them are as follows:
What HAS been promised:
> Adjusting of whatever complication was making it difficult to port brand new Modern Aesthetics to Viera/Hroth throughout ShB. Viera have received every new unlockable hairstyle released since Endwalker came out. I feel confident in saying this problem has been completely resolved.
> Regular updates for Hrothgar and Viera hairstyes. Ongoing.
> Realistic headgear compatibility taking into account our current circumstances. Since Endwalker's launch many more headgear options have become available for both races. All headpieces that rest on the hair or replace the hair completely now function with little to no exceptions.
> Male Viera. Already launched with Endwalker and already made with hairstyle compatibility in mind.
> Female Hrothgar. In development. Coming in the future as a new playable race.
What has NEVER been promised:
> Full headgear compatibility. Sure, the stance changed from "none" to "some" (with limitations) as a result of popular demand, but as of right now there has never been any promise from the devs that Viera and Hrothgar will have every available headpiece. That doesn't mean it can never happen, but it's completely in limbo unless they choose to address the topic. It's being very much ignored right now in favour of talking about what's actually in the works: fem Hroth and hairstyles.
I'll add one addendum which involves the commonly asked question "why can't they just pay the modders and use the mods that have already created in the real game?" Because these devs don't do that, full stop. They never have. If they want something done they do it themselves. I know for us it seems like an easy solution to our collective problem, but mods are against TOS. They aren't going to pay someone to do a job they could one day do themselves.
I think it's very important to keep facts straight so we don't, well, get frustrated wondering why so and so feature has yet to be implemented when we have never had confirmation that they've even been working on said feature. It's really easy to get lost in the distinctions between what things have been addressed and what things haven't been addressed.