become of someone/something
— phrasal verb with become us/bɪˈkʌm/verb past tense became /bɪˈkeɪm/, past participle become
to happen to or be a result for something or someone:
It's unclear exactly what will become of Bill 35 now, but the issues surrounding it aren't going away.
Whatever became of Jennie O’Hearn? (= what happened to)