Just because it's clan specific does not mean that it is a bloodline limit, and what examples of the Databook do you have about things not being labeled as so? Also, Himawari just happened to use Gentle Fist after awakening the eye because she can then pinpoint where to strike. Nothing says she didn't have the ability to expel chakra from all her pressure points before that?
name someone sealing a chakra point beside some Kaguya based individual?
again Hima having the ability to expel chakra like a Hyuga before she awakened her eye wasn't presented in any form via manga or anime
Hinata was surprised that it happened and never knew who did it
plus just hitting a chakra point with the byakugan active isn't even the problem here, she sealed it completely with one strike
the GF taijutsu style can be learnt by anyone though but using it would just be you poking people and palming them like a fool
also some gene related moves
Uzumaki Chains, Susanoo to name some
Himawari not having the byakugan would mean that she wouldn't be able to see the chakra points meaning that if you want to go by the conjecture that she had the other ability without her eyes awakening first then once she did awaken it how would she know what specific part to poke by instinct if she never saw it before
how much to expel and how to seal the whole system without doing 64 or more hits
it would be quite a flimsy miracle, and even now Boruto can't do it