Both these tags android-navigation-component and android-architecture-navigation refer to the Android Jetpack Navigation library provided by Google at https://developer.android.com/jetpack. Unifying them makes sense.
android-architecture-navigation has more questions and is consistent with android-architecture-components or android-architecture-lifecycle or android-architecture-paging
The android-architecture-navigation was undoubtedly being used for the same purpose as android-navigation-component was being used, and many questions had both the tags. The tag wikis were also speaking of the same thing (the android-navigation-component tag wiki was plagiarized and therefore didn't save it)
I merged the tags in the direction that you had earlier proposed, and also added the other tag as a synonym.
