I strongly suspect that various Western intelligence agencies had all this info ready and offered to hand it over before the vote but the Moldovan courts didn’t want to be seen to be trying to influence the election so they sat on it til afterwards.
Same reason Donny and now possibly Elon aren’t currently sat in the holding cell.
It’s one of the exploitable quirks of democracies, the feeling is that if you go after the bad actors before a vote they’ll squeal persecution and it’ll energise their support, making them more likely to win.
But if you wait until after the vote… they may have won anyway.
Fortunately in this instance they didn’t win and Moldova (unlike the USA) have decided to move quickly and decisively against those involved to prevent it happening again in November.
If only this had happened after Jan 6th, there was definately a window for action there that was missed.