In this context, a bribe is irrelevant compared to the act of election interference by a foreign actor.
If you are corrupt, and that corruption helps the opposition, you are accused of election manipulation. If you expose corruption, and that exposure helps the opposition, you are accused of election manipulation.
Meanwhile, the US is pouring billions of dollars into their elections, and if questioned, the questioning is considered an authoritarian encroachment on human rights. The US can make their officials into unpersons with sanctions for doing their jobs with integrity, and they'll just go along with it, tsk-tsking at the official in question.
Too bad for Golob, though - since it's Israel doing it for Israeli reasons, the "left-liberals" won't be able to get any of their usual support to attack them, because it's Israelis all the way down now. Ukraine is old news and competing with Israel for weapons, so there's no need for NATO-lackey Golob anymore.