So the next step for russia is to invest some tiktok money for the the person that would be elected anyways but they hate the most, and this way discredit that person?
Well hopefully they cannot do that in the future, since TikTok is also being investigated in the scandal. They are the ones who pocketed the money for the ads after all, and are required to comply with the electoral laws of the country, which they did not.
(later edit: Actually probably they did not pocket the ad money, since I think the accusation is most of it was not legitimate ads, but puppet-account posts from some service. Of course, TikTok could still be be held responsible to better police these, but perhaps is not the direct destination of the money.)
He only got 23% of the votes and wasn't elected yet, though.
Also what can they do besides disqualifying him or delaying the elections for months(years?) until he's convicted of fraud (hopefully by that point all of his voters would have forgotten all those ads)?