According to the United States feral government, there have been no credible claims that the 2020 Presidential election was rigged.
Back to Square One:
People who would conduct a coup to get their way would have no problem stealing an election to get their way.
You just want them to legitimize your coup by voting in your show elections.
Since I do not concede that there was a coup — Yanukovych was removed by the democratically elected parliament — I do not accept your conclusion that the elections must have been rigged. You, on the other hand, are making that assumption not based on any evidence but only because it advances your justification for Russia’s invasion. In other words: wishful thinking. But here’s the rub, even if your suppositions were true it would still not justify the invasion. Questions concerning the legitimacy of Ukraine’s government are for the Ukrainian people to decide, not Russia. And Russia is the last country that could make the claim that they are intervening in order to protect democracy.