Just to add some clarity...Cross of Sundland by Republican council.
https://www.youtube.com/watch?v=0XDCKRpLk4E
Having now had time to listen to this once again in details, the key fragment starts at 8:20-8:40 where he speaks of his email to Pompeo, then 19:10-19:20 when he clearly states that the conventional wisdom at the time (mid July) was that the investigation of the 2016 election and Barisma (although he mentions no explicit mention of Biden) were needed for the thing (the unlocking of the aid) to move forward, nobody including Bolton reacted to his statements.
Then the fragment between 29:30 and 30:30, when contrary to the intend of the Republican questioner, Sonderland clearly states that everybody up to the president himself was clearly involved in these discussions that were the main channel of communication about Ukraine.
Which means that the presumtion of Sonderland [that the freeing of the aid was conditioned by a declaration from Ukraine about an investigation] was confirmed by the non objection of key stakeholders including Bolton in July time frame and that these discussions were clearly fully known by all the chain of command up to Trump himself.
And again... we are talking here about the top diplomat of the US to the European Union, having been requested to devote special attention to Ukraine (which he confirmed), who has a clear and lasting presumption for 2 months that doesn't get challenged by any of the contacts he has with stakeholders.

It takes a very low level of honesty to consider this cross-examination a proof that there was no quid pro quo. If anything this fully confirms the clear impression from a key witness that there was one.
You've got to love the final smile of the questioner... I can't help but understand it as "good for you, you've been vague enough for your kids not to die in a car accident next month".
Cheers,
Bernard