I think it would be best to finish the tournament online, with the full bracket. This way, we'll have at least 6-7 players with 4 rounds and a proper Buchholz score.

Because the final is still far away, and it's unknown how many players will be from each city. There might be withdrawals, replacements, and disruptions in the qualifying rounds, etc.

Yes, but what if all the finalists fairly decide that it's not right to miss such an event as the final? Therefore, the players must be ranked, at least the top five. The players who finish in 4th and 5th place will replace those who drop out or fill the vacant spots in the final.

+1, I don't see anything wrong with finishing the tournament online.

There is something wrong with it. Let's say the players in the third qualifying round only play two rounds in the club, and the rest online.
The fourth qualifying round - one round...
And we'll hold the final entirely online. And the idea of live interaction will die.

Therefore, I ask the esteemed Captain to decide how the top three winners of the Kyiv qualifying round will be determined. Finish (what can you do - let them play online) the unplayed matches within a week or two.

But this is just a suggestion, well done Ukraine for organizing such an event.