Hoshea the son of Elah was the last non-Davidic king of Israel. Its next king will rule a reunited kingdom from Jerusalem, not Samaria, and he will most assuredly be from the tribe of Judah. A repentant and restored Israel will not mind, we are assured.
Hosea’s prophecy of the fall of the northern kingdom in 722 BC bookends the latter portion of the chapter (verse 7 to the end). It starts with Samaria’s king perishing “like a twig” (ESV) and concludes with the words “At dawn the king of Israel shall be utterly cut off.”
A sobering thought. The phrase “cut off” means to be destroyed.