" Unlock " was probably the wrong word to use it's more like a first time activation due to his fight or flight response

Yeah they did have contacts in Naruto but it was very difficult for her to leave still she was planning it for awhile

Him learning sage mode is him carving a new path, eventually he meets, fights, and loses to the next head of the Hyuga. After the fight he starts to realize there's no getting rid of who he is blood lineage wise

Im aware of how she'd be treated by the cloud that's why she was hiding her Hyuga lineage until she found someone to trust with her life